Study Design and Analysis Quiz

Which of the following best describe the design of this study?

• Quasi-experimental design

• Pre-test and post-test comparison

• True experimental design

• Cross-sectional survey

Which of the following are the independent variables in this study?

• Teaching method (Digital Video vs Textbook-based)

• Students’ vocabulary test scores

• Class size

• Gender

What is the dependent variable in this study?

• Vocabulary test performance

• Type of classroom

• Teaching method

• Class participation rate

Why is this study considered quasi-experimental?

• The groups were intact classes and not randomly assigned

• It involved a pre-test and post-test design

• It used random sampling across schools

• It had no control group

Which of the following statistical tests are most suitable for analyzing the difference in post-test scores between control and experimental groups?

• Independent samples t-test

• Wilcoxon signed rank test

• Paired samples t-test

• Mann-Whitney U test (if normality is not assumed)

Which of the following are valid research objectives for this study?

• To measure the significant difference in the mean post-test scores between the digital vocabulary video and the textbook-based strategies on ESL students’ vocabulary performance.

• To measure the effectiveness of the digital vocabulary video and textbook-based strategies in improving ESL students’ vocabulary performance based on post-test mean scores.

• To measure the significant difference in the mean pre-test and post-test scores within the digital vocabulary video and textbook-based strategies respectively on ESL students’ vocabulary performance.

• To measure the effectiveness of the digital vocabulary video and textbook-based strategies by comparing pre- and post-test mean scores within each group.

Which ethical considerations are relevant for this study?

• Obtaining informed consent from participants

• Ensuring confidentiality of test scores

• Allowing students to opt out without penalty

• Publishing students' names with their scores

What are appropriate scales of measurement for the variables?

• Vocabulary test score: Scale (continuous)

• Teaching method: Nominal

• Gender: Ordinal

• Vocabulary gain category: Interval

What type of sampling was used in this study?

• Non-random sampling (intact classes)

• Simple random sampling

• Stratified sampling

• Systematic sampling

Choose the alternative hypothesis for this research question:

To measure the significant difference in the mean post-test scores between the digital vocabulary video and the textbook-based strategies on ESL students’ vocabulary performance.

• There is a significant difference in the mean post-test vocabulary scores between students taught using the digital vocabulary video and those taught using the textbook-based strategy.

• There is no significant difference in the mean post-test vocabulary scores between students taught using the digital vocabulary video and those taught using the textbook-based strategy.

• The digital vocabulary video strategy results in significantly higher mean post-test vocabulary scores among ESL students compared to those who received instruction through the textbook-based method.

• The textbook-based vocabulary teaching strategy produces significantly higher mean post-test vocabulary scores among ESL students than the digital vocabulary video method.