Which of the following is true of fraternal twins?
A. They are similar to nontwin siblings in that they share about 50% of their genes.
B. They are produced by the division of one fertilized egg.
C. They are always the same sex.
D. They have concordance rates that are higher than monozygotic twins if there is a genetic component involved in a studied characteristic.
Answer: A
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When social psychologist Kurt Lewin said that "there is nothing so practical as a good theory," he meant that ____
a. many theories are overly abstract; a good theory should be based on directly observable facts b. many theories are overly abstract; a good theory should make predictions about directly observable phenomena c. although they may seem impractical, theories can be very important in helping to stimulate practical ideas and practical research d. he was opposed to overly theoretical work and a major proponent of applied research
Answer the following statement(s) true (T) or false (F)
1. The similarity of behavior between helpless subjects and depressed individuals provides support for Seligman’s model of learned helplessness. 2. An external attribution is the belief that internal characteristics cause the outcome. 3. The word car is an example of a concept. 4. Attributes are features of an object or event that varies from one instance to another. 5. The prototype of the concept is the object that has the greatest number of attributes in common with other members of the concept.
The __________ is the peanut-sized structure in the limbic system of the brain that regulates hunger, thirst, hormones, and sexual drive.
A. hypothalamus B. thalamus C. hippocampus D. cerebral cortex
A Pearson r value of .50 or higher must be significant, regardless of the
sample size. Indicate whether the statement is true or false