Justin Is a 6-Month-Old Infant

question 57

Multiple Choice

Justin is a 6-month-old infant. He focuses intently on new stimuli and quickly becomes habituated. What can we infer about Justin's cognitive abilities?

• A) He habituates quickly because he doesn't understand the stimulus.
• B) His tendency to focus intently indicates that he might develop attention-deficit/hyperactivity disorder.
• C) He habituates quickly because he has trouble paying attention.
• D) His behaviors might indicate greater intelligence.

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Definitions:

P-value

The chance of witnessing outcomes in a test that are as or more extreme than what was actually seen, assuming that the null hypothesis is true.

Significance Level

A threshold set by researchers in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha (α).

Rejection Region

The region in the sampling distribution of a statistic that leads to the rejection of the null hypothesis.

Test Statistic

A value calculated from sample data during a hypothesis test, used to decide whether to reject the null hypothesis.