PSYC 100 Lecture Notes - Lecture 4: Standard Deviation, Statistical Hypothesis Testing, Central Tendency
2 Jun 2018
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PSYC 100 – Lecture 4
Ethics in Psychological Research
Promoting the Welfare of Research Participants
• Research ethics board (REB): a committee of researchers and officials at an
institution charged with the protection of human research participants
• Researchers must weight the risks and benefits of their research
• They must also obtain informed consent
o Deception: misleading or only partially informing participants of the true
topic or hypothesis under investigation
o D: ’ xl of the true nature of the study, and
especially the nature of and reason for the deception
• Right to anonymity and confidentiality
• Welfare of animals in research not as scrutinized as in human research
A Statistical Primer
• Descriptive Statistics
o A set of techniques used to organize, summarize, and interpret data
o 3 types of data: frequency, central tendency, and variability
o Frequency
▪ The # of observations that fall within a certain category or range of
scores
▪ Normal distribution: a symmetrical distribution with values
clustered around a central, mean value; bell curve
o Central tendency
▪ A measure of the central point of a distribution; where the scores
seem to cluster together in an examination of data
▪ Mean: the arithmetic average of a set of numbers
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