A person who can identify or produce a musical tone correctly without any outside reference is said to have perfect pitch. This can be tested using a pitch identification test (PIT). Perfect pitch has also been associated with certain disabilities. Danish researchers (Dohn et al., 2012) used the autism-spectrum quotient (AQ) with 34 adults to see whether PIT scores are associated with autism traits. The regression output is shown below. 

a. Identify the direction (positive or negative) of the association between pitch score (PIT) and autism spectrum quotient (AQ). 

b. Do you think the linear association is weak, moderate, or strong? 

c. Describe anything unusual you notice about the scatterplot.

Transcribed Image Text:

27 18 9 0 20 40 PIT 60 80