In this video I explain the major ethical guidelines for conducting research in psychology with human subjects including informed consent, freedom from coercion, protection from harm, risk-benefit analysis, anonymity and/or confidentiality, and debriefing. Don’t forget to subscribe to the channel … Read More
External Validity
In this video I explain external validity (or ecological validity) and criticisms of artificiality that can arise from laboratory experimentation. I also explain naturalistic observation and field experiments as ways of overcoming artificiality and collecting real-life data, though both of … Read More
Internal Validity
In this video I explain the concept of internal validity and how it acts as a checklist for considering whether an independent variable has been effectively manipulated, a dependent variable has been measured without bias, and a clear pattern can … Read More
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Volume 2 of the Master Introductory Psychology series is available for free on Amazon for a limited time (ends Monday night at 11:59pm) so get your copy before it’s too late!
Frequency Distributions, Normal Curves, and Skew
In this video I explain how a frequency distribution can create a visual representation of our data. I also describe a normal curve or “bell curve” and what it means for mean, median, and mode. Then I consider skewed distributions … Read More
Understanding Significance and P-values
In this video I explain the concept of significance and how it relates to both effect size, sample size, and the law of large numbers. The role of a p-value in describing the likelihood of data is explained with an … Read More
Measures of Variance: Range and Standard Deviation
In this video I describe two more descriptive statistics, both of which are measures of variance: the range and the standard deviation. I explain what the standard deviation tells us about a distribution of scores and how it is calculated. … Read More
Difference between a Theory and a Hypothesis
In this video I describe the difference between a theory and a hypothesis. I also explain how evidence can support or refute a hypothesis but can never prove a theory. Don’t forget to subscribe to the channel to see future … Read More
Measures of Central Tendency
In this video I cover descriptive statistics and three measures of central tendency; the mean, median, and mode. The calculation of each is explained, as well as potential problems, such as the mean’s sensitivity to extreme scores, especially in small … Read More
The Experimental Method
In this video I explain the experimental method and how the combination of manipulation and random assignment can help to eliminate the third variable problem. I also explain why random assignment helps avoid self-selection and bias so that we can … Read More