Gibson and Walk Used Six-Month-Old or Older Babies in Their

question 106

Multiple Choice

Gibson and Walk used six-month-old or older babies in their research with the visual cliff, because

• A) babies younger than six months old do not yet have depth perception.
• B) the babies had to be able to crawl across the visual cliff.
• C) younger infants are not yet attached to their mothers.
• D) research ethics do not permit this kind of research with younger infants.
• E) younger infants are unable to use kinetic cues.

---

Definitions:

Control Group

In an experiment, the group that is not exposed to the treatment and is used as a benchmark to measure how the other tested subjects do.

Independent Variable

The variable in an experiment that is manipulated or changed in order to test its effects on a dependent variable.

Dependent Variable

A variable in an experiment that is expected to change in response to changes in the independent variable.

Quasi-experimental

A research design that attempts to establish cause-and-effect relationships but lacks random assignment of participants to control or experimental groups.