A bank teller was so distracted by the sight of a bank robber's weapon that she failed to perceive important features of the criminal's physical appearance. This best illustrates the impact of: selective attention.
Explanation:
Selective attention means concentrating or focusing on a particular object in the environment for specific period of time. It helps us to increase our concentration and ignore the unimportant details.
Selective attention helps in effective functioning of the human brain. The four main types of attention are as follows:
i) Selective attention
ii) Divided attention
iii) Sustained attention
iv) Executive attention
In the above scenario, bank teller was concentrating on the bank robber’s weapon. So she couldn’t recognize the physical appearance of the criminal.