PSYB01H3 Chapter Notes - Chapter 9: Nonprobability Sampling, Interpersonal Communication, Operational Definition
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In such cases, participants may be found in the easiest way possible non-probability sampling. Nothing is wrong with this as long as you recognize that this affects your ability to generalize your results to larger populations, though it is still possible to: you also need to determine your sample size. Increasing the sample size increases the likelihood that results will be statistically significant because larger populations are better estimates of the true population values. Straightforward manipulation: researchers are usually able to manipulate a variable relatively simply by presenting written, verbal, or visual material to the participants. Straightforward manipulation manipulated variables with instructions and stimulus presentations: stimuli may be presented verbally, in written form, via video tape, or over the computer, eg. A study on the impact of heath promotion brochures presented two types of brochures to women one with text only, and one with pictures: most memory research relies on straightforward manipulations.
