The purpose of twin studies is to allow researchers to study
a. the amount of heritability in a trait.
b. people with the same birthdates.
c. people with the same genes.
d. the difference between identical twins.
Answer: a. the amount of heritability in a trait.
You might also like to view...
Between 1991 and 2013, the overall rate of premarital sex among U.S. adolescents ______.
A. remained stable B. increased C. decreased D. tripled
According to psychologists, retroactive interference occurs when:
a. the formation of new memories interferes with the retention of previously established memories b. previously established memories interfere with the formation of new memories c. a head injury causes a loss of memories for events that happened prior to the injury d. a head injury causes a loss of memories for events that happened after the injury
Which of the following is considered a weakness of trait theory?
a. ?It oversimplifies human variability in describing all people on the basis of a small number of dimensions. b. ?It has not contributed any kind of practical or benefit to the study of personality. c. ?It has not generated any additional theories or questions to research. d. ?It does not provide psychologists with a common framework or language to study personality.
The main reason why dissociative identity disorder patients tend to have many additional psychological disorders is that
A. the number of personalities increases the number of disorders. B. the severe trauma of childhood leads to many problems in later life. C. they seek attention. D. they are substance abusers.