Al must build 25 radios before he receives $20 . What schedule of reinforcement is being used?

a. a variable-ratio schedule
b. a fixed-ratio schedule
c. a fixed-interval schedule
d. a continuous schedule
e. a fixed at contiguous schedule

b. a fixed-ratio schedule

Psychology

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In problem solving, the initial state and goal state make up the problem space

a. true b. false

Psychology

Which of the following devices was invented by Robert Fantz and

allows researchers to observe the movements of an infant's eyes in order to determine what infants can see and what holds their attention? a. looking chamber b. perceptual box c. infant perception theater d. visual stimuli and response chamber

Psychology