The highly addictive depressants of opium, morphine codeine, and heroin are classified as

The habituation-dishabituation technique is used by researchers to

A) analyze which object the infant prefers to look at. B) analyze whether the infant is able to discriminate between novel and familiar stimuli. C) observe the infant's response to familiar stimuli. D) observe the infant's response to novel stimuli.

Compared to true experiments, quasi-experiments

a. generally do not control extraneous variables as well b. are less useful for answering many real-world questions c. lack realism d. can not be analyzed using sophisticated statistics e. all of the above