PSYB04H3 Chapter Notes - Chapter 3: Random Assignment, Statistical Conclusion Validity, Music Lesson
Document Summary
Chapter 3: three claims, four validities interrogation tools for. Variable something that varies, so it must have at least two levels/values; e. g. nearly. 60% of teens text while driving - the variable is texting while driving and levels are whether a person does text while driving or doesn"t. Constant something that could potentially vary but only has one level in the speci c study; e. g. gender would be a constant in a study that is just about fathers. Measured variable levels are simply observed and recorded; e. g. height, iq, bp. Manipulated variable controlled by researcher, usually by assigning people to di erent levels of the variable; e. g. give some people 10mg, 30mg, or 60mg. Some can be both e. g. to see childhood extracurriculars, you can measure whether kids have already taken the music or drama lessons or you can manipulate variable by assigning them to either music or drama. Variables can be described in 2 ways, depending on the context.
