An executive in a computer software firm works with his office door closed. at the same time every hour he opens the door to see what his employees are doing. the employees have learned to work especially hard during the five minutes before and while the door is open. their work pattern is typical of responses that are reinforced on a schedule. a. fixed-interval
b. fixed-ratio
c. variable-ratio
d. variable-interval

Select the correct answer. sean is a computer programmer. he has programmed an application for toddlers that plays nursery rhymes. however, a logic error has occurred in the program. which problem is a likely consequence of the error? a. the program crashes every time the user wants to play the nursery rhymes. b. the program crosses its buffer boundaries and overwrites an adjacent program. c. the program plays a different nursery rhyme than the one the user intended to play. d. the program shows different structures in its programming language code. e. the program introduces new viruses every time the user plays a nursery rhyme.