If more participants drop out of one of the levels of your independent variable than a second level, you may have a problem with mortality as a threat to internal validity.
Indicate whether the statement is true or false
Question 2
Suppose you have two levels of your independent variable and you assign participants to the levels by asking them to volunteer for one of the levels, the threat to external validity that you should be most concerned with is maturation.
Indicate whether the statement is true or false
Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
How to rearrange formulas to isolate for a variable
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Variable expression of yellow phenotype in mice caused by diet-related epigenetic changes in the gen