In observational research, a behavior of interest might occur only intermittently. If an investigator wanted to estimate the frequency of the behavior by taking a snapshot at random times, the approach would involve

Grass seen through sunglasses appears equally as green as it does without glasses. This best illustrates

A) Weber's law B) sensory interaction C) accommodation D) color constancy

Emotions appear to serve useful social functions in any culture because they

a. help people feel good about themselves. b. release pent-up energy. c. communicate important information to other members of that culture. d. help individuals to understand their own behaviors. e. are indicators of specific physiological conditions.