# Question

Following on from Exercise 15.3, suppose that my colleagues were tired of having children tell them what they think we want to hear and gave them a heart-to-heart talk on the necessity of accurate reporting. Suppose that this reduced their population mean Lie score from 4.39 to 2.75, again with a standard deviation of 2.61. If we have 36 children for this analysis, what is the power of finding significantly fewer distortions in these children’s reports than in the general population? The population of normal children still has a population mean of 3.87.

## Answer to relevant Questions

Diagram the situation described in Exercise 15.6 along the lines of Figure 15.2. Calculate d^ for the comparisons you made in Exercise 16.10 and interpret the meaning of each. Use the Bonferroni test for the data in Exercise 16.7 to compare the WL group with each of the other three groups. What would you conclude? How does this compare to the answer for Exercise 16.10? In Exercise 16.7 Using the data from Exercise 16.25, (a) Calculate h2 and v2. (b) Why do the two estimates of the magnitude of effect in part (a) differ? (c) Calculate a measure of d^, using the most appropriate groups. Thomas and Wang (1996) looked at the effects of memory on the learning of foreign vocabulary. Most of you have probably read that a good strategy for memorizing words in a foreign language is to think of mnemonic keywords. ...Post your question

0