Statistical Analysis: Wilcoxon Test Results

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Questions and Answers

What was the outcome of the Wilcoxon Signed-Ranks Test regarding the keyword method and the rote learning method?

The Wilcoxon test did not indicate statistical differences between the methods. (correct)

The keyword method was significantly more effective than rote learning.

There were significant differences between the two methods.

Both methods resulted in equally poor performance.

What does a p-value greater than 0.05 indicate in the context of the Wilcoxon Signed-Ranks Test?

The differences between the groups are not statistically significant. (correct)

The sample size is too small to draw any conclusions.

The results are statistically significant.

There is a strong positive effect of the tested methods.

What can be inferred about the negative ranks in the Wilcoxon Signed-Ranks Test results?

Negative ranks suggest no response to any learning method.

They show a preference for rote learning over the keyword method.

Negative ranks indicate stronger performance in the keyword method.

They represent instances where rote learning was less effective than the keyword method. (correct)

What was the result of the Wilcoxon Signed-Ranks Test comparing rote learning and semantic mapping immediate post-test scores?

There were no statistically significant differences. Signup and view all the answers

What statistical test was used to compare the scores from the three delayed post-tests?

Friedman test Signup and view all the answers

Which technique resulted in significantly higher word retention according to the Wilcoxon Signed-Ranks Test?

Keyword technique. Signup and view all the answers

How many ties were reported in the Wilcoxon Signed-Ranks Test?

11 Signup and view all the answers

What was the p-value associated with the Wilcoxon Signed-Ranks Test comparing keyword and semantic mapping techniques?

0.016 Signup and view all the answers

How many participants demonstrated positive ranks in the keyword-semantic immediate post-tests?

1 Signup and view all the answers

What does a Z value of -2.413 in the Wilcoxon Signed-Ranks Test indicate?

Statistically significant differences exist. Signup and view all the answers

How many negative ranks were recorded in the Wilcoxon Signed-Ranks Test for rote and semantic immediate post-tests?

7 Signup and view all the answers

In the comparison of keyword method and semantic mapping immediate post-tests, which of the following was true?

Keyword method led to higher mean ranks. Signup and view all the answers

What was the sum of ranks for negative ranks in the rote-semantic immediate post-tests?

36.50 Signup and view all the answers

What was the result of the Wilcoxon Signed-Ranks Test for rote memorisation immediate and delayed post-test scores?

The immediate scores were significantly higher. Signup and view all the answers

What was the median rank difference for negative ranks in the rote memorisation test?

8.50 Signup and view all the answers

Which statement correctly describes the effectiveness of the semantic mapping technique?

It was effective but yielded the lowest scores. Signup and view all the answers

What were the z-scores indicating significance in the rote memorisation test results?

-3.363 Signup and view all the answers

What was the p-value for both tests conducted?

0.001 Signup and view all the answers

How many positive ranks were recorded in the Wilcoxon Signed-Ranks Test for the semantic technique?

0 Signup and view all the answers

Which group showed the highest mean ranks in the results presented?

Rote memorisation immediate scores Signup and view all the answers

What were the participants primarily able to recall after seven weeks according to the rote memorisation results?

Half of the words Signup and view all the answers

Study Notes

Wilcoxon Signed-Ranks Test Overview

Conducted to evaluate differences in word retention techniques: rote learning, semantic mapping, and keyword methods.
Sample size (N) = 16 for statistical analysis.

Rote vs. Semantic Immediate Post Tests

Negative Ranks: 7 participants showed lower performance in semantic mapping than rote learning, with a mean rank of 5.21.
Positive Ranks: 2 participants recalled more words with semantic mapping, mean rank 4.25.
No statistical significance was found (Z = -1.672, p = 0.095), indicating similar retention levels with both techniques.

Keyword vs. Semantic Immediate Post Tests

Negative Ranks: 7 participants had better retention using keyword technique (mean rank 5).
Positive Ranks: 1 participant recalled fewer words with semantic mapping (mean rank 1).
A significant difference emerged (Z = -2.413, p < 0.01) favoring the keyword method for word retention.

Keyword vs. Rote Immediate Post Tests

Negative Ranks: 3 participants performed better with keywords (mean rank 3.83).
Positive Ranks: 2 participants favored rote learning (mean rank 1.75).
No significant difference detected (Z = -1.084, p = 0.279), suggesting similar effectiveness between the two methods.

Delayed Post-Test Analysis

Friedman test on delayed post-test scores indicated no significant differences among the three methods (c2(2, N=16) = 2.172, p > 0.05).

Rote Immediate vs. Delayed Post Tests

Negative Ranks: 14 participants showed lower recall in delayed tests (mean rank 8.50).
Statistically significant decline observed (Z = -3.363, p < 0.001) indicating lower retention over time.

Semantic Immediate vs. Delayed Post Tests

Negative Ranks: 14 participants also showed reduced recall in delayed semantic mapping tests (mean rank 7.50).
Significant decline noted (Z = -3.307, p < 0.001), highlighting a decrease in effectiveness over time despite the method's initial success.

Key Findings

Rote learning and semantic mapping techniques initially shown to be equally effective.
Keyword methods demonstrated superior immediate retention capability.
Both rote and semantic mapping experiences a significant decline in retention from immediate to delayed testing.
Results suggest a need for caution in interpreting the effectiveness of various memory techniques over time.

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Description

This quiz focuses on the results of the Wilcoxon Signed-Ranks Test applied to Rote and Semantic Immediate Post Tests. It provides an analysis of negative and positive ranks, including mean ranks and significance levels. Enhance your understanding of non-parametric statistics and hypothesis testing with this engaging quiz.