A human-factors psychologist randomly assigns half of his participants to use Keyboard A and the other half to use Keyboard B. He measures the number of words per minute typed by people in each group. He suspects that Keyboard A is designed better and will therefore facilitate a higher words-per-minute rate. He conducts an independent-samples t-test and obtains the following results: What is Cohen’s d in this example?
a. 1.44
b. 1.95
c. .067
d. .872
Ans: D
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Securely attached infants tend to become
A) teens who are more likely to be leaders. B) young adults with satisfying romantic relationships. C) children who have high self-esteem. D) ALL of the above have been found.
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Indicate whether the statement is true or false.
Which of these individuals thought that a celibate lifestyle was superior to marriage?
a. Plato b. St. Paul c. Jesus d. Henry Havelock Ellis