2010632 Week 2 In-Class Quiz 1

Which is not one of the key activities in an experimental design?

• Identifying the independent, dependent, and nuisance variables

• Indicating the method of randomisation

• Indicating the statitical method for data analysis

• Reporting experimental results

What is an example of the conditions or levels of a quantitative independent variable?

• Educational degree (BA, MA, PhD)

• Gender (male and female)

• Amount of reading time (5 hours, 10 hours, and 20 hours)

• Nationality (Thai, Japanese, and Korean)

What is an example of the conditions or levels of a qualitative independent variable?

• Type of instruction (incedental and intentional teaching)

• Word frequency (500, 1000, and 1500)

• Amount of reading time (5 hours, 10 hours, and 20 hours)

• Temperature (40C, 50C, and 60C)

What should be done to determine the appropriate levels of the independent variable?

• Review the results of previous experiments

• Consider relevant theories

• Carry out a small pilot experiment

• All are correct.

What is NOT true about the nuisance variables?

• Undesired sources of variation in an experiment that affect the dependent variable

• The effects of nuisance variables are of no interest per se

• If not controlled, nuisance variables can affect the outcome of an experiment

• All nuisance variables can be controlled

Choose three characteristics of an experiment.

• Manipulatiing one or more independent variables

• Use of controls, such as randomly assigning subjects or experimental units to experimental conditions

• Careful observation or measurement of one or more dependent variables

• Reporting the results from an experiment

Choose two characteristics that distinguish experiments from non-experimental research strategies.

• Manipulating one or more independent variables

• Use of controls such as randomly assigning subjects or experimental units to experimental conditions

• Careful observation or measurement of one or more dependent variables

• Reporting the results from an experiment

Choose one characteristic that distinguishes experiments from quasi-experiments.

• Manipulating one or more independent variables

• Randomly assigning subjects or experimental units to experimental conditions

• Careful observation or measurement of one or more dependent variables

• Reporting the results from an experiment

What is the research purpose that surveys cannot achieve?

• To explore variables

• To describe variables

• To classify variables

• To establish relationships amongst variables

• To establish causality between variables

What is the research purpose that experiments and quasi-experiments can achieve but other research strategies cannot?

• To explore variables

• To describe variables

• To classify variables

• To establish relationships amongst variables

• To establish causality between variables