Experimental Research - Is there an interaction between word
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Researchers are interested in how long it takes to read words as a function of (a) word length and (b) word concreteness. They present 48 participants with a list of 80 words of four different types: short concrete words, (e.g., map) long concrete words (e.g., alligator), short abstract words (truth), and long abstract words (e.g., acknowledgment). Following are the reading times (in milliseconds) for each condition.
Short Concrete: 600 Short Abstract: 950
Long Concrete: 770 Long Abstract: 1100
Identify the independent and dependent variable(s) of this hypothetical experimental study.
Did this experiment employ a within- or between-subjects design? Explain.
Are any main effects evident in the data? Explain.
Is there an interaction between word length and word type? Explain.
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Solution Summary
Your tutorial is 317 words and explains how to figure out which is the dependent and independent variables and how an interaction might look in this data (there is no interaction as presented).
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Q: Identify the independent and dependent variable(s) of this hypothetical experimental study.
The independent variables are the explanatory variables, the ones that you think will change the outcome. So, the word length and word concreteness are the independent variables
The dependent variable is the response or outcome variable, the one you expect to respond to the independent variables. In this case, it is reading time you expect to vary based on the two independent variables.
Q: Did this experiment employ a within- or between-subjects ...
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