1. It is difficult to see a chameleon that has blended in with its background because we cannot easily distinguish between figure and ground
of the principle of common fate
of the perceptual principle of shape constancy
of the illusion of relative size
our depth perception is not as advanced as the other visual perceptors
2. One of your friends is writing a research paper and wants to obtain information about the depth of personal information people typically reveal during a first date. Directly observing a large number of people during a first date will be difficult, so your friend asks for your advice on the best way to collect this type of data. The best suggestion would be for your friend to use
a double-blind observational study
correlational research
the case study approach
a survey
archival research