Why is a Pearson's r of .6 more than twice as useful as a Pearson's r of .3?
What will be an ideal response?
The coefficient of determination for r = .6 shows that the variables have 36 percent of their variance in common; when r = .3, the variables have 9 percent of their variance in common. The r=.6 would be more useful for prediction.
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Self-esteem has been identified as a characteristic that seems closely tied to school success and social adjustment
a. True b. False Indicate whether the statement is true or false
According to Ehri's Phases of Development of Sight Word Learning, during the Full Alphabetic Phase:
A) children connect visual attributes of a word to its pronunciation. B) children learn to pronounce words using letters in the word. C) children use sound/symbol associations and phonological awareness skills to read words. D) children use knowledge of word parts or letter patterns to read words, including polysyllabic words.
The primary purpose of experimental research is to
a) Show causation b) Show correlation c) Describe d) Study relationships
When writing true-false items, what must be considered?
a. Only one answer can be correct. b. Focus on more than one idea. c. Write them in question format. d. Include statements of opinion.