Experimental and Quasi-Experimental Designs Quiz

What is the independent variable in the example of a study examining the impact of oral corrective feedback on grammatical development?

• Grammatical development

• Corrective feedback

• Working memory

• Control group

In the example study by Peters and Webb (2018), an experimental pretestposttest design to examine the effect of TV viewing on the incidental learning of L2 vocabulary.what is the independent variable?

• Dutch learners of L2 English

• Form recognition and meaning recall of L2 vocabulary

• Viewing versus not viewing L2 television

• The experimental and control groups

What is the purpose of the pretest in a pretest-posttest control group design?

• To determine the immediate effects of the treatment on the outcome variable

• To examine the time course of language development

• To counterbalance data collection instruments

• To ensure the comparability of the two groups prior to the treatment

What is the main feature that distinguishes non-experiments from true experiments?

• The manipulation of one or more independent variables

• The lack of random assignment

• The inclusion of a control group

• The use of multiple pre- and post-tests

What is the preferred method for participant assignment in experimental research?

• Randomized assignment

• Non-randomized assignment

• Systematic assignment

• Voluntary assignment

What is a characteristic of a time-series design?

• Single observation before and multiple after treatment

• Collection of data on a single occasion

• Lack of pre-treatment observations

• Regular data collection over a set period

What characterizes repeated measures designs?

• Different groups of participants assigned to various treatment conditions

• Single group of participants tested at multiple times or under different treatment conditions

• Participants subjected to only one level of the independent variable

• Different participants tested on various levels of the independent variable

How does a within-participants design differ from a between-participants design?

• It involves repeated measurements of the same participants

• Treatment conditions are assigned to different groups of participants

• It automatically assumes group equivalence

• It uses counterbalancing to control for confounds