laolz.blogg.se - Validity and reliability in quantitative research example

Randomization or random assignment: Randomly assigning participants to treatment and control groups, ensuring that there is no systematic bias between the research groups.Random selection: Choosing participants at random or in a manner in which they are representative of the population that you wish to study.

Experimental manipulation: Manipulating an independent variable in a study (for instance, giving smokers a cessation program) instead of just observing an association without conducting any intervention (examining the relationship between exercise and smoking behavior).

Blinding: Participants-and sometimes researchers-are unaware of what intervention they are receiving (such as using a placebo on some subjects in a medication study) to avoid having this knowledge bias their perceptions and behaviors, thus impacting the study's outcome.