See this at: amazon.com| Added on 12/08/09

From the creators of Yahoo!'s Design Pattern Library, Designing Social Interfaces provides you with more than 100 patterns, principles, and best practices, along with salient advice for many of the common challenges you'll face when starting a social... See more

From the creators of Yahoo!'s Design Pattern Library, Designing Social Interfaces provides you with more than 100 patterns, principles, and best practices, along with salient advice for many of the common challenges you'll face when starting a social website. Designing sites that foster user interaction and community-building is a valuable skill for web developers and designers today, but it's not that easy to understand the nuances of the social web. Now you have help. Christian Crumlish and Erin Malone share hard-won insights into what works, what doesn't, and why. You'll learn how to balance opposing factions and grow healthy online communities by co-creating them with your users. * Understand the overarching principles you need to consider for every website you create * Learn basic design patterns for adding social components to an existing site * Rein in misbehaving users on an active community site * Build a social experience around a product or service and invite people to join... See less

Highlights: Price: $44.03

See this at: amazon.com| Added on 07/30/09

Product Description This packaged product includes Handcrafted CSS: More Bulletproof Web Design (book) and Handcrafted CSS: Bulletproof Essentials (DVD-ROM). The book and DVD are designed to complement each other and provide a complete training... See more

Product Description This packaged product includes Handcrafted CSS: More Bulletproof Web Design (book) and Handcrafted CSS: Bulletproof Essentials (DVD-ROM). The book and DVD are designed to complement each other and provide a complete training solution for the intermediate to advanced Web designer. Handcrafted CSS: More Bulletproof Web Design (Book) This is a different kind of CSS book. It takes the approach that there's a real connection between craftsmanship and Web design. Handcrafted CSS gives frustrated Web designers the ammo they need to convince their clients and bosses to adopt innovative and effective CSS techniques that make their lives easier while improving the end user's experience. This book offers designers a transitional approach that teaches them when it's OK to push the envelope a bit, how best to do it, and when not to. The book's seven chapters deconstruct various aspects of a case-study Web site, focusing on aspects that make it bulletproof and demonstrate... See less

Highlights: List Price: $54.99 | Price: $34.64 & this item ships for FREE with Super Saver Shipping. Details | You Save: $20.35 (37%) | Pre-order Price Guarantee. Learn more.

See this at: amazon.com| Added on 06/29/09

Product Description Thoroughly rewritten for today's web environment, this bestselling book offers a fresh look at a fundamental topic of web site development: navigation design. Amid all the changes to the Web in the past decade, and all the hype... See more

Product Description Thoroughly rewritten for today's web environment, this bestselling book offers a fresh look at a fundamental topic of web site development: navigation design. Amid all the changes to the Web in the past decade, and all the hype about Web 2.0 and various "rich" interactive technologies, the basic problems of creating a good web navigation system remain. Designing Web Navigation demonstrates that good navigation is not about technology-it's about the ways people find information, and how you guide them. Ideal for beginning to intermediate web designers, managers, other non-designers, and web development pros looking for another perspective, Designing Web Navigation offers basic design principles, development techniques and practical advice, with real-world examples and essential concepts seamlessly folded in. How does your web site serve your business objectives? How does it meet a user's needs? You'll learn that navigation design touches most other aspects of web... See less

Highlights: List Price: $49.99 | Price: $31.49 & this item ships for FREE with Super Saver Shipping. Details | You Save: $18.50 (37%)

See this at: fivesimplesteps.co.u...| Added on 03/02/09

Mark Boulton is a designer from the UK. He’s worked exclusively in web design for over ten years, but has a background in traditional graphic and typographic design. Drawing on this traditional background, Mark is able to bridge the gap between... See more

Mark Boulton is a designer from the UK. He’s worked exclusively in web design for over ten years, but has a background in traditional graphic and typographic design. Drawing on this traditional background, Mark is able to bridge the gap between graphic design and the modern web design. Mark runs his own web design studio, Mark Boulton Design, who specialise in designing simple, beautiful things for the modern web. He also co-wrote Web Standards Creativity published by Friends of Ed, and he writes a popular blog, mostly about design. What started out as a few blog posts, has been rewritten from scratch into five parts, each with five chapters: Part 1: Getting Started In this part, you’ll learn about what it takes to get started for designing for the web. You’ll learn about the various tools, processes, and practices. Part 2: Research and Ideas Design begins with information, information gleaned from research. This research in turn informs ideas. In this part, you’ll learn the various... See less

See this at: amazon.com| Added on 02/25/09

Amazon.com: The Psychology of Human-Computer Interaction: Stuart K. Card, Thomas P. Moran, Allen Newell: Books

Amazon.com: The Psychology of Human-Computer Interaction: Stuart K. Card, Thomas P. Moran, Allen Newell: Books See less

Highlights: You Save: $15.95 (23%)

See this at: amazon.com| Added on 06/26/08

Amazon.com: Measuring the User Experience: Collecting, Analyzing, and Presenting Usability Metrics (Interactive Technologies) (Interactive Technologies): Thomas Tullis, William Albert: Books

Amazon.com: Measuring the User Experience: Collecting, Analyzing, and Presenting Usability Metrics (Interactive Technologies) (Interactive Technologies): Thomas Tullis, William Albert: Books See less

Highlights: You Save: $3.45 (7%)

See this at: amazon.com| Added on 06/11/08

Product Description The trick to great design is knowing how to think through each decision so that users don't have to. In Designing the Moment: Web Interface Design Concepts in Action, Robert Hoekman, Jr., author of Designing the Obvious, presents... See more

Product Description The trick to great design is knowing how to think through each decision so that users don't have to. In Designing the Moment: Web Interface Design Concepts in Action, Robert Hoekman, Jr., author of Designing the Obvious, presents over 30 stories that illustrate how to put good design principles to work on real-world web application interfaces to make them obvious and compelling. From the first impression to the last, Hoekman takes a think out loud approach to interface design to show us how to look critically at design decisions to ensure that human beings, the kind that make mistakes and do things we don't expect, can walk away from our software feeling productive, respected, and smart. See less

Highlights: $26.39

See this at: amazon.com| Added on 05/20/08

Product Description <>Praise for the second edition of The Design of Sites "In my worldwide IBM marketing role, I have the benefit of working with some of the finest international interactive agencies and internal Web teams. As I read The Design of... See more

Product Description <>Praise for the second edition of The Design of Sites "In my worldwide IBM marketing role, I have the benefit of working with some of the finest international interactive agencies and internal Web teams. As I read The Design of Sites, [I see] the insight from years of professional advice has been put to paper. Nowhere have I seen such a practical, effective, and easy-to-use book to solve and avoid Internet design issues. I keep a copy of the book handy to remind me of the things I forgot and to gain fresh perspectives. It never fails to deliver." -John Cilio, marketing manager, IBM System x & z Storage Synergy "The Design of Sites artfully brings forward the original intent of Christopher Alexander’s pattern language into the user experience design arena. It is a valuable and comprehensive reference." -George Hackman, Jr., senior director of User Experience for User Interface Guidelines, Patterns and Standards, Oracle Corporation "The Design of Sites is one of the... See less

Highlights: $37.79

See this at: rosenfeldmedia.com| Added on 03/03/08

There is no single methodology for creating the perfect product—but you can increase your odds. One of the best ways is to understand users' reasons for doing things. Mental Models gives you the tools to help you grasp, and design for, those reasons.... See more

There is no single methodology for creating the perfect product—but you can increase your odds. One of the best ways is to understand users' reasons for doing things. Mental Models gives you the tools to help you grasp, and design for, those reasons. Adaptive Path co-founder Indi Young has written a roll-up-your-sleeves book for designers, managers, and anyone else interested in making design strategic, and successful. Mental Models is available in full-color paperback and digital (PDF) versions. Substantial supplemental content is available on this site, and all of the book's images can be downloaded from Flickr. What's a mental model? Those in the field of cognitive research have been describing and defining mental models for a few decades. The term "mental model" has come to mean "a mental representation." The mental models described in this book are representations of people's behavior, philosophies, and emotion around how they accomplish something, regardless of which tools they... See less

Highlights: $36

See this at: amazon.com| Added on 02/26/08

This is an insightful and necessary read for anyone entering the field of interaction design/user experience but also serves as a wonderful refresher for current practitioners, covering all the major areas, from software to devices, to entire... See more

This is an insightful and necessary read for anyone entering the field of interaction design/user experience but also serves as a wonderful refresher for current practitioners, covering all the major areas, from software to devices, to entire systems. With lucid, articulate, easy language Saffer explains what I regard as the fundamentals of interaction design: definitions, contexts, methods/approaches, and new frontiers, all backed by relevant and clear examples. Some noteworthy highlights: compact case studies of real designs (like Google's IM), interviews with veteran design pros like Hugh Dubberly, Marc Rettig, Shelley Evansen, and a sharp look at Service Design and design for devices. Saffer fluidly conveys what I've always struggled to express: interaction design is not just web design, but a mode of thought and action towards improving relationships. With this book, Saffer is clearly poised to be an influential voice for interaction design, a field many of us practice unwittingly... See less

Highlights: $29.70

See this at: amazon.com| Added on 02/26/08

* Paperback: 204 pages * Publisher: O'Reilly Media, Inc. (September 26, 2005) * Language: English * ISBN-10: 0596007655 * ISBN-13: 978-0596007652 * Product Dimensions: 8.7 x 6 x 0.5 inches * Shipping Weight: 12.8 ounces (View shipping rates and... See more

* Paperback: 204 pages * Publisher: O'Reilly Media, Inc. (September 26, 2005) * Language: English * ISBN-10: 0596007655 * ISBN-13: 978-0596007652 * Product Dimensions: 8.7 x 6 x 0.5 inches * Shipping Weight: 12.8 ounces (View shipping rates and policies) * Average Customer Review: (43 customer reviews) * Amazon.com Sales Rank: #8,935 in Books (See Bestsellers in Books) Popular in these categories: (What's this?) See less

Highlights: $19.77

See this at: amazon.com| Added on 02/26/08

Review "The no-nonsense approach includes guidelines, tables for estimating costs, and plenty of detailed practial advice. Simply written, well-structured and highhy ifnormative. Don't leave home without it."--Gerry Gaffney, Founder and Director,... See more

Review "The no-nonsense approach includes guidelines, tables for estimating costs, and plenty of detailed practial advice. Simply written, well-structured and highhy ifnormative. Don't leave home without it."--Gerry Gaffney, Founder and Director, Information & Design Review You'll like Mike Kuniavsky's broad selection of practical user research methods--presented clearly and usably. And you'll like his timing too: while recent books focus on the whys of user experience, many are now ready for the hows. Observing the User Experience does just that: It demonstrates how to discover what is in users' heads, and suggests how we might balance those considerations with business objectives. Lou Rosenfeld, co-author of Information Architecture for the World Wide Web Wow! So many of the user experience research methods we have refined and used over the years are now organized and described in detail in one book. It is an essential reference for any practitioner. --Christian Rohrer, Manager, User... See less

Highlights: $36.51

See this at: amazon.com| Added on 02/26/08

"...not a how-to book, ...not a book about technology, ...(and) not a book of answers. Instead, this book is about asking the right questions. "This book will tell you what you need to know before you go read those other books. If you need the big... See more

"...not a how-to book, ...not a book about technology, ...(and) not a book of answers. Instead, this book is about asking the right questions. "This book will tell you what you need to know before you go read those other books. If you need the big picture, if you need to understand the context for the decisions that user experience practitioners make, this book is for you." See less

Highlights: $23.09

See this at: amazon.com| Added on 02/26/08

This book is different from most books on designing user interfaces since the ideas are presented as design patterns, much as you would see in Gamma's classic book on the subject had it been adapted to human-computer interfacing rather than... See more

This book is different from most books on designing user interfaces since the ideas are presented as design patterns, much as you would see in Gamma's classic book on the subject had it been adapted to human-computer interfacing rather than programming. Each of the patterns and techniques presented in this book are intended to help the reader solve common design problems. Patterns and techniques are presented for web sites, desktop applications, and everything in between such as web forms, Flash, and applets. The user interface design patterns presented in this book are intended to be read by people who have some knowledge of UI design concepts and terminology: dialogs, selection, combo boxes, navigation bars, whitespace, branding, and so on. The book does not identify many widely-accepted techniques such as copy-and-paste, as it is assumed that you probably already know what this is. However, some common techniques are described here to encourage their use in other contexts -- for... See less

Highlights: $32.97

See this at: amazon.com| Added on 02/26/08

With more and more applications moving toward the web and websites becoming exceedingly more complex than ever intended for their original design, Alan's new version of this book is well-timed. Now how do we get both web and software designers to... See more

With more and more applications moving toward the web and websites becoming exceedingly more complex than ever intended for their original design, Alan's new version of this book is well-timed. Now how do we get both web and software designers to read it? Alan, Robert, and David walk you through the complete process of orienting your product to your customers' goals. They provides you with the tools to build a product that will delight, rather than baffle, your customers. In this day and age of great application frameworks, it is fast and easy to get a web-based application up and running. But please don't do it, at least not until you have read this book! I'm buying copies as early Christmas presents for all my software designer friends in hopes that I will see the end result as when I try to use some of these products. Comment | Permalink | Was this review helpful to you? (Report this) See less

Highlights: $29.70

See this at: amazon.com| Added on 11/15/07

When creating a web site, it's very easy to fall into the trap of designing it for yourself. Unfortunately, you're not the typical user in most cases, nor are you the intended audience. You can avoid this problem with the use of "personas". The... See more

When creating a web site, it's very easy to fall into the trap of designing it for yourself. Unfortunately, you're not the typical user in most cases, nor are you the intended audience. You can avoid this problem with the use of "personas". The subject is covered very well in this book. User-driven design means that you focus on what the user needs in a system instead of designing features because they're "cool". Personas are imaginary users of your system that you keep in mind while designing how the application will work. But it's much more than just picking a name like Bob and then coding away... This book goes into the process of interviewing the user base of your proposed application, determining the needs and abilities of that base. A system that is to be used by computer-savvy accountants will not have the same look and feel as a system that is intended for your grandmother. By conducting these interviews and consolidating the results, the designer can get a good idea as to what... See less

Highlights: You Save: $13.60 (34%)

See this at: amazon.com| Added on 11/06/07

Review "Designing Interactions offers multiple interfaces in its own right. It's not just a well-designed, nicely indexed book, with a heft that strains the tendons (the back of my review copy cracked after only a few hours of gentle use), but also... See more

Review "Designing Interactions offers multiple interfaces in its own right. It's not just a well-designed, nicely indexed book, with a heft that strains the tendons (the back of my review copy cracked after only a few hours of gentle use), but also an enclosed DVD with interviews, and a website (designinginteractions.com) that includes a weekly downloadable chapter. There's an inherent lesson in this arrangement, which is the value of choice. The very randomness of Moggridge's archive shows the truest quality of good interaction design: personality." -- I.D. Magazine "This is one hell of a book.... Part history lesson, part computer science thesis, part design education, part personal design philosophy, it is fascinating, inspirational, occasionally baffling, and often hilarious." -- Helen Walters, BusinessWeek.com "This will be the book--the book that summarizes how the technology of interaction came into being and prescribes how it will advance in the future. Written by the designer... See less

Highlights: $26.37

See this at: amazon.com| Added on 09/20/07

Sketching User Experiences by Bill Buxton This is a great book, for anyone involved with innovation, product management, communication of new ideas or product development. Bill Buxton has put forth some great examples of what a Sketch is how it is a... See more

Sketching User Experiences by Bill Buxton This is a great book, for anyone involved with innovation, product management, communication of new ideas or product development. Bill Buxton has put forth some great examples of what a Sketch is how it is a prelude to a prototype and how to "create" the future cheaply for testers and user groups to experience things with in expensive and fast tools. The idea is to create rapid examples of future good and services to see how well they work. As Buxton mentions in the book, fail fast and early, learn fast and early. Redesigning a product or relaunching one is very expensive. This is a great read and deals with products and services in their "wholistic" setting. A new idea exists in a context and that context determines its success or failure. I would strongly recommend you buy this book or e-mail me and I might just lend you my copy. I keep only 1 of 10 books I read, but this one I will be holding onto or lending out. Some fun quotes from the... See less

Highlights: Price: $32.97 & this item ships for FREE with Super Saver Shipping. Details

See this at: uie.com| Added on 05/15/06

Are you frustrated because your users can't find their desired content? Do you have valuable content on your site your users don't know about? Do you want your users to find your site so valuable that they keep returning? Erik Ojakaar and Jared M.... See more

Are you frustrated because your users can't find their desired content? Do you have valuable content on your site your users don't know about? Do you want your users to find your site so valuable that they keep returning? Erik Ojakaar and Jared M. Spool, two of the experts from User Interface Engineering, share the best practices of sites that consistently get users to the content they want. They have spent hours watching real users work with real web sites and culled the eight best, most successful techniques for connecting your users with your content. We've packed this easy-to-follow report with practical, hands-on advice plus plenty of examples from live, production web sites. You'll learn exactly what the best sites do to succeed and find out what mistakes to avoid. See less

Highlights: Until now, this information was only available to design teams spending $20,000 or more

See this at: uie.com| Added on 05/15/06

The users coming to your site all have one thing in common: their animal instinct. When a user wants to find something on your site, they are on the hunt. Just like a fox in a forest, they’ll be most successful when they pick up a strong scent.

The users coming to your site all have one thing in common: their animal instinct. When a user wants to find something on your site, they are on the hunt. Just like a fox in a forest, they’ll be most successful when they pick up a strong scent. See less

Highlights: Single Report: $30.99

See this at: amazon.com| Added on 04/18/06

Dan Cederholm is a web designer and independent web author currently living in Salem, MA. His CSS redesigns of Fast Company and Inc. magazines' web sites have gained him the respect of web designers all over the world as an advocate of building... See more

Dan Cederholm is a web designer and independent web author currently living in Salem, MA. His CSS redesigns of Fast Company and Inc. magazines' web sites have gained him the respect of web designers all over the world as an advocate of building clean, accessible sites with Web Standards. Dan also publishes markup and style tips and techniques on SimpleBits, his personal web site. See less

Highlights: Price: $22.04 & eligible for FREE Super Saver Shipping on orders over $25.

See this at: amazon.com| Added on 04/10/06

Is it impossible to schedule enough time to include users in your design process? Is it difficult to incorporate elaborate user-centered design techniques into your own standard design practices? Do the resources needed seem overwhelming?... See more

Is it impossible to schedule enough time to include users in your design process? Is it difficult to incorporate elaborate user-centered design techniques into your own standard design practices? Do the resources needed seem overwhelming? <br><br>This handbook introduces Rapid CD, a fast-paced, adaptive form of Contextual Design. Rapid CD is a hands-on guide for anyone who needs practical guidance on how to use the Contextual Design process and adapt it to tactical projects with tight timelines and resources.<br> <br>Rapid Contextual Design provides detailed suggestions on structuring the project and customer interviews, conducting interviews, and running interpretation sessions. The handbook walks you step-by-step through organizing the data so you can see your key issues, along with visioning new solutions, storyboarding to work out the details, and paper prototype interviewing to iterate the designall with as little as a two-person team with only a few weeks to... See less

See this at: amazon.com| Added on 04/10/06

Creativity is about capturing those moments that make life worth living. The author's objective is to offer an understanding of what leads to these moments, be it the excitement of the artist at the easel or the scientist in the lab, so that... See more

Creativity is about capturing those moments that make life worth living. The author's objective is to offer an understanding of what leads to these moments, be it the excitement of the artist at the easel or the scientist in the lab, so that knowledge can be used to enrich people's lives. Drawing on 100 interviews with exceptional people, from biologists and physicists to politicians and business leaders, poets and artists, as well as his 30 years of research on the subject, Csikszentmihalyi uses his famous theory to explore the creative process. He discusses such ideas as why creative individuals are often seen as selfish and arrogant, and why the tortured genius is largely a myth. Most important, he clearly explains why creativity needs to be cultivated and is necessary for the future of our country, if not the world. See less

See this at: amazon.com| Added on 04/10/06

<div>The first book to capture the philosophy and spirit behind the work of Charles and Ray Eames, <i>An Eames Primer</i> offers an in-depth look at the couple's prolific legacy--one that has placed them among the most important American designers of... See more

<div>The first book to capture the philosophy and spirit behind the work of Charles and Ray Eames, <i>An Eames Primer</i> offers an in-depth look at the couple's prolific legacy--one that has placed them among the most important American designers of the twentieth century.<br><br>Those who know one or two aspects of the Eameses' work are often surprised to learn just how far and vast their range extended. Yet throughout their myriad works, from architecture and furniture to exhibition design and filmmaking, their core philosophy prevails. <i>An Eames Primer</i> is the first book to illuminate this seamless connection.<br><br>Author Eames Demetrios explores the rich energy of the Eameses' world from a unique perspective, informed by his close relationship with Charles and Ray. He shares personal anecdotes, previously unpublished photos, and his extensive interviews with former friends and colleagues of the Eameses to make connections between the Eameses' influential philosophy and their... See less

See this at: amazon.com| Added on 04/10/06

Practical guidelines for the Ergonomic Design of Products and Facilities You'll find: Key Descisions to make at the conceptual design stage; Diagrams, charts and checklists; Data on cognitive skills, sensory capacities, mobility, strength, and... See more

Practical guidelines for the Ergonomic Design of Products and Facilities You'll find: Key Descisions to make at the conceptual design stage; Diagrams, charts and checklists; Data on cognitive skills, sensory capacities, mobility, strength, and dexterity; Tables of Engineering unit conversions and scientific constants; Designs that "fit the user"; Human Body size, reach, strength, reaction time, environmental stress resistance. Now revised and updated, this definitive guide--recognized worldwide as the leading source of ergonomics data and guidelines--is even more useful for integrating the human factor in the design of facilities, systems, products, and equipment. To help you ensure safe and efficient use, and prevent user error, injury, inconvenience, or dissatisfaction, the second edition of Human Factors Design Handbook includes step-by-step guidelines and valuable human factor data for identifying and accommodating the needs of people in architecture and the design of furnishings,... See less

See this at: amazon.com| Added on 04/10/06

There's certainly no shortage of software design methods: most demand total allegiance, and many claim to be the only true way to delivering useful and maintainable software systems in a timely manner. <I>Contextual Design</I> describes another... See more

There's certainly no shortage of software design methods: most demand total allegiance, and many claim to be the only true way to delivering useful and maintainable software systems in a timely manner. <I>Contextual Design</I> describes another worthwhile software engineering method, one that places the user (or customer) at the forefront of the software design process from beginning to end. This method seems to be a particularly worthwhile addition to the literature.<p> Contextual Design begins with <I>contextual inquiry</I>, where software developers interview users and attempt to understand the way they work. Such "customer empathy" is central to the Contextual Design process and a total understanding of "work" within organizations is the mantra here. The book describes how, later in the process, software developers step back from the user data and do an "affinity," which is an overall analysis of hundreds (or even thousands) of individual facts. <I>Contextual Design</I> then... See less

See this at: amazon.com| Added on 04/10/06

With <I>Visual Explanations</I>, Edward R. Tufte adds a third volume to his indispensable series on information display. The first, <I>The Visual Display of Quantitative Information,</I> which focuses on charts and graphs that display numerical... See more

With <I>Visual Explanations</I>, Edward R. Tufte adds a third volume to his indispensable series on information display. The first, <I>The Visual Display of Quantitative Information,</I> which focuses on charts and graphs that display numerical information, virtually defined the field. The second, <I>Envisioning Information,</I> explores similar territory but with an emphasis on maps and cartography. <I>Visual Explanations</I> centers on dynamic data--information that changes over time. (Tufte has described the three books as being about, respectively, "pictures of numbers, pictures of nouns, and pictures of verbs.") <P> Like its predecessors, <I>Visual Explanations</I> is both intellectually stimulating and beautiful to behold. Tufte, a self-publisher, takes extraordinary pains with design and production. The book ranges through a variety of topics, including the explosion of the space shuttle <I>Challenger</I> (which could have been prevented, Tufte argues, by better information... See less

See this at: amazon.com| Added on 04/10/06

A timeless classic in how complex information should be presented graphically. The Strunk & White of visual design. Should occupy a place of honor--within arm's reach--of everyone attempting to understand or depict numerical data graphically. The... See more

A timeless classic in how complex information should be presented graphically. The Strunk & White of visual design. Should occupy a place of honor--within arm's reach--of everyone attempting to understand or depict numerical data graphically. The design of the book is an exemplar of the principles it espouses: elegant typography and layout, and seamless integration of lucid text and perfectly chosen graphical examples. Very Highly Recommended. See less

See this at: amazon.com| Added on 04/10/06

A remarkable range of examples for the idea of visual thinking, with beautifully printed pages. A real treat for all who reason and learn by means of images. -- Rudolf Arnheim

A remarkable range of examples for the idea of visual thinking, with beautifully printed pages. A real treat for all who reason and learn by means of images. -- Rudolf Arnheim See less