Question

this schedule of reinforcement results in a form of psychological conditioning characterized by increases in the rate of activity associated with those scheduled events. in the case of high school students, there is a tendency among many to procrastinate in preparing for, say, friday tests. the students know the test will occur on schedule every friday, so will delay preparing for those tests until as late in the week as possible. the test occurs, and the students relax.
variable-interval
fixed-ratio
variable-ratio
fixed-interval

Explanation:

Fixed - Interval reinforcement schedule is when reinforcement is provided after a fixed amount of time has passed. In the case of high - school students and Friday tests, the test (a form of 'consequence' or in operant conditioning terms, a potential reinforcer or punisher contextually) occurs every Friday (fixed time interval). Students know the fixed time (every Friday) and thus procrastinate until late in the week. Variable - Interval has an unpredictable time interval. Fixed - Ratio is based on a fixed number of responses, and Variable - Ratio is based on a variable number of responses. Since the example is based on a fixed time (every Friday), it aligns with Fixed - Interval.

Answer:

Fixed - Interval