Transcranial magnetic stimulation is a type of non-invasive brain stimulation, whereby a brief electrical current is generated within the cerebral cortex. This electrical pulse is generated by sending a current through a coil held at a predetermined position on the … Continue reading →

Quota sampling is a non-random sampling technique, where groups are targeted in proportions which match the proportions of the same groups in a larger population.

Accidental sampling is a form of sampling where participants are chosen haphazardly or from a group which is convenient to reach.  

The Likert scale is a widely used type of scale designed to measure people’s attitudes, as given on a scale of 5 specific levels of agreement or disagreement. This type of scale was introduced by American psychologist Rensis Likert in 1932. Source: Likert, … Continue reading →

The Mann Whitney U Test is a statistical test which is used to test the null hypothesis from two sets of data. The test is a non-parametric test, meaning that no assumptions are made regarding the probability distributions of the variables being assessed.

An F-test is a statistical technique designed to measure the likelihood of two samples having come from two normal distributions with different variances. With an F test we can contrast a null hypothesis (with equal variances) with an alternative hypothesis … Continue reading →

Factor analysis is a type of multivariate statistical method, where variables are grouped in order to reduce complexity. Correlations can be observed between factors without losing too much information.

Q methodology is a research method in psychology and other social sciences used to study people’s subjective views or experiences. Q methodology lies somewhere between qualitative and quantitative methodology and is most commonly used to assess value orientations, attitudes and … Continue reading →

The beneficence principle refers to an obligation that researches have to take into consideration the benefits and harms that are likely to be incurred in proposed studies, and to strive to maintain a reasonable balance between these.

Field experiments are experiments carried out in a natural setting, and are otherwise very similar to lab experiments. The participants are randomly assigned to groups. Field experiments are good bridges between laboratory experiments and naturally occurring data.