Paper, Order, or Assignment Requirements
Exercise 9-33 – found on page 338 in your textbook
Exercise 10-50 – found on page 398 in your textbook
Submit your assignment using a single Excel workbook. Place each exercise/problem on a separate tab (sheet). Format the Excel spreadsheet to make all computations. The computations must be included in the assignment solutions. Be sure that you highlight or otherwise distinguish the answers.
THE TEST IS IN TWO SECTIONS. EACH SECTION IS WORTH 15 POINTS.
This section is based on
Lee, S.-K. (2007). Effects of textual enhancement and topic familiarity on Korean EFL students’ reading comprehension and learning of passive form. Language Learning, 57, 1, 87-118.
Questions in this section are :
In table 4 (p. 101), Lee reports the results of the reading proficiency test and the form correction task at pretest time. On p. 99 he presents the results of ANOVAs, comparing the scores of the 4 groups.
1.1 From Table 4, which relationship is apparent between the reading proficiency test results and the form correction task results?
1.2 Looking at the means and standard deviations of the form correction task results in Table 4, what can you conclude about the distribution of the results in the groups?
1.3 Lee writes:
A one-way ANOVA revealed that the four groups were not statistically different from one another in terms of their general reading ability,F(3, 255)=.35, p=.79; nor did they differ from one another in their performance on the formcorrection task at the onset of the study, F(3, 255) = 1.01, p = .39. (p. 99)
In what way(s) is this statement not completely correct?
On pp. 101 to 103, Lee describes the results of the form correction task.
2.1. On page 102, Lee reports the results of a two-way ANOVA, investigating effects of enhancement and topic familiarity. You can consider this as two separate ANOVAs, one for enhancement and the other for topic familiarity. In your own words, what was the outcome of the ANOVA for topic familiarity?
2.2 Lee shows in Figure 1 that lines of the two +E groups are far steeper than the lines of the two –E groups. What does this indicate?
2.3 In table 6 (p. 103), Lee shows the results of dependent t-tests, comparing pre- and post scores for the four groups. What is the p-value for the +E / -F group?
On pp. 102 to 105, Lee describes the results of the free-recall task. Again running a two-way ANOVA (which you can consider equivalent to two separate ANOVAs), Lee shows that both features, topic familiarity and textual enhancement, significantly affected recall.
3.1 Looking at Table 7, which feature (textual enhancement or topic familiarity) actually hindered recall? How can you tell? (2 points)
3.2 Again looking at Table 7, which feature (textual enhancement or topic familiarity) had the stronger effect? How can you tell? (2 points)
3.3 How do you explain the effects of topic familiarity and textual enhancement on recall?
On p. 105, Lee describes the results of a correlation between scores from the form correction and free recall tasks.
4.1 Was this probably a Pearson or a Spearman correlation? Why? (2 points)
4.2 As Lee shows in Table 8, the correlation for the total population is far lower than the correlation for each of the four groups. How is that possible?
4.3 Lee finds higher correlations between task scores for students who had the unenhanced texts than for students who had enhanced texts. What do you think is the reason for these higher correlations?
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