A child psychiatrist hypothesizes that word chunking improves language development. To investigate, the psychiatrist assesses a group of 7-year olds by asking them to recall as many words as they can starting with the letter "i". The psychiatrist then asks the parents to ensure their children practice word chunking for 60 minutes each day for four weeks. At the end of the four weeks, the psychiatrist assesses the same children by asking them to recall as many words starting with the letter "i" again. What can be concluded with ? = 0.01? The word recall data are below. 1nd 2nd 6 8 3 5 9 6 4 7 5 8 6 2 8 4 3 5 a) What is the appropriate test statistic? b) Condition 1: Condition 2: c) Obtain/compute the appropriate values to make a decision about H0. Critical Value = ; Test Statistic = Decision: d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below. [ , ] e) Compute the corresponding effect size(s) and indicate magnitude(s). If not appropriate, input and/or select "na" below. d = ; Magnitude: r2 = ; Magnitude: f) Make an interpretation based on the results. Word chunking significantly impairs language development.Word chunking significantly improves language development. Word chunking did not have a significant impact on language development.
A child psychiatrist hypothesizes that word chunking improves language development. To investigate, the psychiatrist assesses a group of 7-year olds by asking them to recall as many words as they can starting with the letter "i". The psychiatrist then asks the parents to ensure their children practice word chunking for 60 minutes each day for four weeks. At the end of the four weeks, the psychiatrist assesses the same children by asking them to recall as many words starting with the letter "i" again. What can be concluded with ? = 0.01? The word recall data are below.
| 1nd | 2nd |
| 6 8 3 5 9 6 4 7 |
5 8 6 2 8 4 3 5 |
a) What is the appropriate test statistic?
b)
Condition 1:
Condition 2:
c) Obtain/compute the appropriate values to make a decision about H0.
Critical Value = ; Test Statistic =
Decision:
d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[ , ]
e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
d = ; Magnitude:
r2 = ; Magnitude:
f) Make an interpretation based on the results.
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