7 Psychological Principles Every Designer Should Know

1. Von Restorff Effect

The Von Restorff effect states that an element that deviates from the norm attracts more attention and is more memorable.

Hedwig von Restorff demonstrated this in 1933 by showing participants a series of similar items and finding they recalled the distinctive one more easily.

Designers can apply this by making a design element stand out through shape, color, size, etc., but overemphasis may weaken the overall impression.

2. Hick's Law

Hick's Law describes that the time to make a decision increases with the number of choices, leading to decision overload.

In design, keep navigation simple with few options, use dropdowns to group pages, and limit calls to action so users can decide quickly.

The same principle applies to action prompts: present one or two primary actions (e.g., a donation button) and keep secondary actions less prominent.

3. Maslow's Hierarchy of Needs

Maslow's pyramid outlines human needs from physiological and safety needs up to self‑actualization.

Marketers and designers can map target users to these levels to craft personas, motivate higher‑order desires, and evoke emotions that guide users toward the desired outcome.

4. Color Psychology

Colors evoke specific emotions; for example, black suggests elegance and power, white conveys purity, red conveys courage and desire, blue conveys calm and trust, yellow conveys optimism, green conveys balance, purple suggests luxury, orange suggests friendliness, and pink conveys calmness.

Black: elegance and power

White: clean, pure

Red: courage, motivation, desire

Blue: calm, stability, trust

Yellow: optimism, joy

Green: balance, sustainable growth

Purple: royalty, spiritual awareness, luxury

Orange: friendship, comfort, food

Pink: calm, femininity, sexuality

Remember that color meanings can vary across cultures and religions; the list above reflects a Western perspective.

5. Facial Recognition

Humans are naturally drawn to faces; incorporating faces in posters, web pages, or book covers can significantly increase attention and conversion rates.

Faces can connect with the audience, guide gaze based on eye direction, and convey emotion using six universally recognized expressions: happiness, sadness, surprise, fear, disgust, and anger.

6. Fitts's Law

Fitts's Law states that the time required to move to a target is a function of the target's size and distance; larger clickable areas are easier and faster to select.

In web design, make buttons and navigation links sufficiently large, and consider shrinking the clickable area of destructive actions (e.g., delete or cancel) to prevent accidental clicks.

7. Occam's Razor

Occam's Razor suggests that the simplest solution is often the best; designers should avoid unnecessary complexity that can overwhelm users.

Combined with Hick's Law, keeping interfaces simple reduces choice overload and improves usability.

Psychology plays a crucial role in everyday life, and designers should leverage these principles to create user‑centric, conversion‑focused work.

Source: UXDResearchLab