First of all, 'Design' and 'Art' are entirely different things.....

Design is not just about creating something beautiful, it is our approach to a problem , it is about creating a plan for solving the problem ( Physical/ Visual)

As UX designers, for creating meaningful experiences , it is important that we understand the problem deeply. We must be able to empathize with the users to feel their frustrations and pain points, their motivations and needs. For this purpose , we have to rely on a set of laws and principles in human psychology and perception. This article covers those basic laws and standards followed by experience designers

Miller's law

"An average human brain can only keep 7 (plus or minus 2) items in their working memory"

When presented with overwhelming information , it is difficult for the users to keep all of that in their short term memory. So its always better to 'chunk' data into groups of 5 to 9 items at a time

for example , check out how spotify present their content as different groups, another example would be the spacings between phone numbers or credit card digits which helps users to remember it better.

Jakob's Law

"Users spend most of their time on other sites or apps, so they would expect your site or app to work in the same way as they already know"

This law was formulated by Jakob neilson of the Neilson Norman Group.This means as a designer you have to stick to the standards and conventions which the users are already familiar with. They dont like unwanted surprises.

For example , a user will automatically assume that clicking the logo of your website takes him to the home page.

Isolation Effect / Von Restorff Effect

"When multiple similar objects are present , the one that differs from the rest is most likely to be remembered"

The takeaway for a UX designer from this would be to make sure that important informations and functions are visually distinctive from other elements in the UI.

For example , Guess why the CTAs in websites always standout from the rest.

Serial Position Effect

" Users have the propensity to best remember the first and last items in a series"

This means that we have to make sure the most important items / functions are positioned in the begining and end of a list / series.

Hicks' Law

" The time it takes to make a decision increases with the number and complexity of choices "

Overwhelming the users with a lot of options makes him confused , its always better to keep recommendations minimal.

Another implementation of Hick's law would be in the case of new users. Use progressive onboarding to present the features as they move through the app, rather than presenting it all at once.

Fitt's Law

" The time taken to acquire a target is the function of distance to the target and size of the target"

Applying Fitt's Law in your design is vital to prevent human errors. Always design your buttons and other clickable elements large enough ( Minimum of 44 x 44 pixels) space them out  and postion them in the right manner so that the user won't miss it.