Validity:

The extent to which a test measures what it is supposed to.

 

Variable Interval Schedule:

A schedule of reinforcement that reinforces a response after an unpredictable number of responses.

 

Variable Ratio Schedule:

A schedule of reinforcement that reinforces a response after an unpredictable number of responses.

 

Vestibular Sense

The sense of balance and body movement and position.

 

Visual Capture:

The tendency for vision to dominate the other senses.

 

Visual Cliff:

A laboratory devise made for testing the depth perception of infants and animals.

 

Visual Encoding:

The encoding of visual images.