Question

. What issues are most important when recruiting participants for an experiment? Include ethical issues that should be addressed.

What are differences between random selection and random assignment?

What is an independent-groups experiment? Describe two procedures for random assignment used in an independent-groups experiment.

What is a dependent-groups experiment? Describe two procedures for random assignment used in a dependent-groups experiment.

Answer 1

There are most important issues when recruiting participants for an experiment. These are :

• Sample size requirements
• Ethical principles
• The data collection methods (questionnaire, interview techniques)

Ethical principals : Ethical principle is a most important process when recruiting participants for an experiment. There have some ethical principals in a recruiting process :

• Confidentiality
• Honesty
• Not to discriminate on the basis of gender, race, skin colour.
• Consistency etc.

Data collection method :

• Interviews - This method of collecting data use presentation or oral verbal response. There are two type of interview method in ethical data collection. These are structured interview and unstructured interview. structured interviews are those interviews in which the questions that are to be asked from respondents are prepared and preplanned by the researcher. In unstructured interview the researcher conducts an interaction with the respondent in an informal atmosphere.
• Questionnaire - Questionnaires are basically a kind of paper pencil and multiple choice test. The researcher can collect relavant data through the help of questinnaire from large number of sample at a single time. Questionnaire can be administered in three ways :-

1) Mail servey

2) Group administered questionnaire

3) And household drop off servey.

Sample size requirements : The sample size requirement is an important feature of an experiment for recruiting participants. Through this sample size study experimental make a hypothesis about the total population. Before an recruiting process this is an important ethical process.

Therefore these are the most legal principle for an experiment to recruiting participants.