Previous research suggests visual-spatial ability varies with gender. You are interested in investigating the effect of an iPhone app to help college students improve their visual spatial ability
You randomize students to either work with the visual-spatial app or to solve crossword puzzles. You asses their performance on a measure of visual-spatial ability before and after the intervention. Which of the following extraneous variable should you control?
a) Gende
b) Linguistic ability
c) Penmanship skills
d) Age
A
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The knowledge of at which temperature water boils is an example of __________
a) fluid intelligence. b) short-term memory. c) crystallized intelligence. d) critical thinking.
Intellectual disabilities caused by postnatal problems include all of the following EXCEPT
a. malnutrition during early childhood. b. exposure to lead, PCBs, and other toxins early in childhood. c. fetal alcohol syndrome (FAS). d. living in very poor households where nutrition, intellectual stimulation, medical care, and emotional support may be inadequate.