The pitch of an auditory stimulus is related to sound frequency

A professional counselor tests a hunch that government counselors older than 60 years are far happier in their positions than their counterparts in private practice. The researcher interviewed 100 older workers from both occupations and found that indeed government counselors were happier than those in private practice in their later years. What additional information might indicate a history threat of internal validity?

a. The government counselors had recently received a raise b. The private practice counselors were from one geographic region c. Several of the participants do not speak English as their first language d. The survey was too long

Recognizing your home in the suburbs from the other similar-looking houses requires the use of

a) pattern perception. b) absolute thresholds. c) perceptual constancy. d) perceptual organization.