You can make it rectangular, you can make it rounded,

depending on what you want to focus on.

Of course you can use different palettes, different types of icons.

Again, icons are usually mnemonic

and denote the action that people rather do.

If you are shown a sign of a cloud, then you understand we mean “Cloud”, some Cloud technologies.

If you show this cloud to a child, what will be the reaction? Well, not always clear.

If you show a cloud to an older person, they will most likely think that there is some kind of weather stuff.

Generally, their reaction to this button will be generally unpredictable, from the point of view of the designer and from the point of view of the programmer.

Some people are colorblind, who do not recognize colors. Generally, if you make such buttons, or such ones,

nothing good will come of it. They just won’t see them.

It will be just a white background for them and maybe shades of grey, or they won’t see this button on the screen at all

and will look for a long time where to press that OK button to close that window.

You should always be able to switch to modes that allow people with different health conditions to work.

In Windows, there is such a possibility,if the programmer has connected all these features,

then switching Windows to the mode for colorblind and visually impaired should turn all programs into that mode.

Well, only if the programmer specifically considers this. If not, then your program will remain with the same colors, with the same size.

Next… Of course, each program can be decomposed into other types of display.

For different groups of people these displays should be different and, so each time under different devices you need to reprogram each element, each interface,

to do different sets of procedures over functions, which will be realized,

and, accordingly, you will have the structure of dialogues completely changed.

We will have this with you in the laboratories and we will have it on the lectures in the following methods too.

Well, the main definition, yes, just as our subject is called, this is the most basic definition.

I recommend you write it down, it will be admission to the exam. Who does not know what is the intelligent definition, will not receive the admission.

Our discipline combines knowledge of the “psychology of cognition”, which means that we have to study different people in different aspects,

we have to design a software product or some computer system according to their psychology.

A computer system can be this model(on left board), the one we considered here before, that we have a mechanized part, a computer,

maybe some firmware, drivers, there are electronic data transmissions, and then there is an human – machine interface for user interaction.

This is exactly our computerized stuff. In addition, sociology. Sociology deals with groups of people.

If you know, there are such youth trends like Goths, Emo, whoever else is there.

Yes, they also perceive things differently, so if you want to make a program for them, for being actively used,

it is desirable to know their social behavior and how they deal with that kind of program.

Ergonomics is also necessary. Ergonomics determines comfort. That is how much this product will not be redundant,

how quickly you will react to it and be able to use it immediately and you will not be

psychologically irritated and you will always be psychologically satisfied with the ease of use.

Of course, nothing can be done without system analysis. You must have had a subject like “Systems Analysis”?

Yes or no?

Where you had to collect all the parameters and according to the statistics calculate all the components and deviations from the norms.

Accordingly, these deviations and finding the average value allows you to recover this system analysis.

And the so-called industrial design. If we take an artistic design, the artist can draw a picture,

he thinks that his colors are optimal, that these sizes of sun, grass and the rest are good,

but if it’s all pasted on a tiny screen, this picture just does not fit.

For example, the color display technology on this display does not allow you to display all the palettes.

Therefore, the industry, the implementation of display types, affects the drawing of your buttons.

You will write a program, for example, for black and white displays, such as parking.

Colors are not necessary there, so you are only interested in fonts and resolution.

You need to consider exactly where, on which devices, in which cases, your program will work.

Well, since you and I use mostly computers, we need all interfaces that we will develop

within the frames of human-machine interaction for the widest class of users, to ensure this measure of efficiency.

Have you heard it, in some other subjects… did you have economics… in the first year?

Maybe you had an economy in school. You probably had to count efficiency. Human-hours, right?

We calculated labor productivity, economic effect. Counted, right?

You can also calculate these economic effects from the interfaces.

If there is a huge window and there are too many buttons, the efficiency for the average person will be low.

If he is an experienced programmer, then the more buttons, the better.

The efficiency of it on the contrary will increase than the fact that it will be poking long between windows.

Now, what else is there to mean? The so-called user experience.

Have you heard the concept of ‘user experience’ everywhere in vacancies, in offices?