Method or Madness
This study type includes random assignment, a manipulated IV, and a measured DV
What is a True Experiment
This effect happens when participants experience changes simply because they believe they are receiving a treatment
What is the Placebo Effect
This occurs when the independent variable has no affect on the dependent variable
What is a Null Effect
This term refers to the likelihood of detecting an effect when one exists in the data
What is Power (Statistical)
Participants experience all conditions at the same time, and a single measurement is taken
What is Concurrent Measures Design
This random variation in data cannot be explained by the independent variable
What is Error Variance
When participants’ extreme scores naturally move closer to the average upon retesting
What is Regression to the Mean
A range of values that’s likely to include the true population parameter—narrower is better for precision!
What is a Confidence Interval
In this type of design, the same participants are measured after each condition
What is Repeated Measures Design
When participants' scores are so high that no difference between groups can be detected
What is the Ceiling Effect
This outside variable changes alongside the independent variable, messing with the dependent variable
What is a Confound
The different conditions or groups in an experiment, created by the independent variable
What are the Levels of an IV
This effect occurs when participants' scores are so low that no difference can be detected between groups
What is the Floor Effect
This error occurs when there is inaccuracy or inconsistency in measuring the dependent variable
What is a Measurement Error
This occurs when a variable unintentionally varies with the independent variable, offering an alternative explanation for the results
What is a Design Confound
When the independent variable is not strong enough to produce a measurable change in the dependent variable
What is Weak Manipulation