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:

The bank teller shows the impact of shock and terror.

Explanation:

The bank teller themselves in the extraordinary circumstance of a bank robbery and was faced with a gun to their face and thus only remembers what is out of the ordinary.

The gun was a source of horror and trauma for the bank teller so it is that that they remember in vivid detail as their mind would have been completely focused on the gun and not much else.

Due to this unrelenting focus on the gun she would not have noticed the face of the person wielding that gun.

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.