| Abstract [eng] |
We rarely think about how we perceive objects in our surroundings. We can categorize objects – divide them into groups according to their similarities. Objects can be perceived one by one – serial processing, or at the same time if they belong to same category – parallel processing. In order to assess how objects are processed, a visual search task was used. Two experiments were carried out. Subjects needed to tell if there was a label object in visual stimuli. Situations were selected with different number of objects, categories and target objects. 336 for 1st experiment and 320 for 2nd experiment stimuli were created. Each subject viewed stimuli once. Results show that reaction time and answer accuracy depended on all of 3 factors. Reaction time directly is affected by the number of objects and categories and is inversely proportional to the number of target objects. Answer accuracy is lower when there is small number of target objects compared to the number of objects and when there is a low number of categories and a lot of objects. Lower answer accuracy might be caused by miscategorization or inhibition of searched objects. Three processing strategies were also checked – serial, parallel and their intermediate variant facilitated serial. First two strategies did not reflect every situation and results were best corresponded to intermediate variant. This means that, once an object is recognized in a certain category, following objects in the same category will be recognized easier. |
