Design Psychology
Key question
Why does design feel good?
People evaluate design quickly and often instinctively, long before they can justify this assessment. Emotion influences what we pay attention to, who we trust, and what we remember.
Learning objective: You explain how aesthetic experience, first impressions, and brand identity shape judgements, and you handle this responsibly.
Feelings are data about design.
6.1 / Three levels
Design works on three levels at once.
Don Norman describes emotional design across three levels. Good design takes all three into account:
VISCERAL
First Impression
Look, sound and feel. This level reacts quickly and emotionally.
BEHAVIOUR
Use
Does it work? Is it pleasant and efficient to use? This is where it is decided whether something truly impresses in everyday life.
REFLECTIVE
Meaning
What does the product say about me? What do I remember, and do I tell others about it?
First you like it, then it works, then it stays.
6.2 / Aesthetics & First Impression
Beautiful things seem usable and credible more quickly.
The aesthetic-usability effect describes how visually appealing interfaces are often perceived to be easier to use. The first evidence came from studies by Masaaki Kurosu and Kaori Kashimura (1995) on cash machine layouts, which were later followed by further research, such as that by Noam Tractinsky.
For designers, this is both an opportunity and a risk: appealing design increases tolerance and satisfaction, but it can mask genuine issues. Impact and actual performance should be tested separately: how quickly and accurately can a task be completed, and how does it feel?
In a frequently cited study (Lindgaard et al., 2006), participants evaluated websites after just a fraction of a second, and these first impressions closely matched their later ratings. First impressions are therefore formed very early on.
Design is one of the things people use to gauge a site's credibility, alongside content, sources, and accuracy. In the Stanford studies by BJ Fogg (2003), almost half of all comments referred to visual appearance when people were asked to explain why they trusted a website. Spelling mistakes, broken links, or an inconsistent look often undermine that trust.
However, a first impression is no guarantee: it can change through experience, and it should never be used to deceive people.
Looking good seems trustworthy, but it isn't automatically so.
6.3 / Familiar & simple
People like what they know and easily understand.
Familiarity breeds affection (mere-exposure effect, Robert Zajonc): we tend to like what we see more often. Simple, easily readable stimuli are easier to process, and this ease is often experienced positively.
At the same time, people do not want to be bored. The designer Raymond Loewy coined the MAYA principle for this: most advanced yet acceptable, meaning as progressive as possible, but still acceptable.
What is considered beautiful varies by age, culture, expertise, and context. It is therefore worth asking your target audience rather than relying on your own taste.
Familiar plus a little new is what people like best.
6.4 / Brand & Tone
A brand is the personality behind the presence.
Brands come across like individuals with character. Researcher Jennifer Aaker described five dimensions of brand personality: sincerity, excitement, competence, sophistication, and ruggedness. Tone of voice, imagery, colour, typography, and language all contribute to this impression.
Storytelling gives design a context: a story has a premise, a conflict, and a resolution, and is much easier to remember than a list of features.
Micro-interactions are small, purposeful moments within the user experience, such as a subtle animation when submitting a form or a friendly empty state message. They provide feedback and can spark delight, but they should never distract from the task at hand.
Tone of voice is the voice that connects everything.
Exercise
Apply, evaluate, transfer
Task: Enhance an understated interface (for example, a simple form or an account overview) with purposeful emotional elements: tone of voice, animation, or visual imagery.
STEP 1
Describe in advance what feeling the interface should evoke, and in whom.
STEP 2
Add no more than three elements that support this feeling, and leave the controls unchanged.
STEP 3
Compare before and after with at least three people: What impression does the interface give? How quickly can the task be completed?
Evaluation: Has the feeling changed, and performance too? Where did the emotional delivery not match the content? Where is there a risk of masking shortcomings?