Quantitative data collection methods - Experimental research

5 important questions on Quantitative data collection methods - Experimental research

Define independent / causal / experimental (X)

Variable that is used to manipulate the situation and to cause a change (effect)

i.e Medication

Define dependent / effect (Y)

Variable which changes under the influence of the independent variables e.g a medical condition

Define laboratory or unbiased experiment

Assessing the effects of experiment variables on subjects in a s situation that can be controlled as fas as possible, free from outside interference
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Pretest/baseline measurement

Measurement preceding the experiment

What are the characteristics of unbiased experimental design

  1. Causal relationships are investigated; X --> Y
  2. X is the independent or cause variable, Y is the dependent variable or effect variable
  3. The cause variable precedes the effect variable in time
  4. Hypotheses are formulated about the results
  5. Groups are exposed to the experimental variable cause under circumstances that are as unbiased as possible
  6. This group of people is similar in composition in terms of several attributes
  7. Subjects are randomly assigned to the experimental and control groups

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