Article 3: Decrease in Prevalence of a Stimulus

Question 1

What happens when people look at blue dots and then the blue dots become rare?

Answer 1

people start seeing purple dots as blue dots

Question 2

How do people respond to decrease in prevalence of a stimulus?

Answer 2

By expanding their concept of it

Question 3

How does prevalence induce concept change?

Answer 3

If most behaviors are less aggressive than they once were, then some behaviors will seem more aggressive than they once did

> > mistakenly conclude that the prevalence of aggression has not declined

> > prevalence induced concept change

Question 4

What happens when the prevalence of blue dots increases?

Answer 4

participants are less likely to identify a dot as blue

Question 5

Under what conditions did the effect of change in prevalence continue to occur?

Answer 5

1. When the change was abrupt.
2. When participants were explicitly
   told that the prevalence of instances would change.
3. When participants were instructed and paid to ignore
   these changes.