Which of the following represents the most serious threat to internal validity?
A) selection bias
B) nonresponse bias
C) heterogenous attrition
D) homogeneous attrition
C
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What is the current status of the Atkinson-Shiffrin model of memory?
a. Almost all of the recent research supports the model. b. Only the concept of sensory memory is still of interest to researchers. c. The theory has been completely abandoned, because there is no research support for the distinction between short-term memory and long-term memory. d. Some studies support the distinction between short-term memory and long-term memory, but other studies suggest that these two forms of memory are actually similar.
The most crucial step in the process of securing a job is the face-to-face interview
Indicate whether the statement is true or false
To retrieve a toy, Samara had to remove a barrier, displace a cloth, and pull a string. Samara's success on this task suggests that
a. she can coordinate several subgoals to accomplish an end. b. she does not yet have object constancy. c. she can solve fairly simple means-end tasks. d. she does not understand the consequences of deliberate actions.
When examining heredity, mental disorders are almost always
a. influenced by one particular gene. b. influenced by multiple genes. c. influenced by recessive genes. d. not influenced by genes.