Variable of interest, in an experimental study, a changing quantity that is measured. One or more of these variables, referred to as the factors of the study, are controlled so that data may be obtained about how the factors influence another variable referred to as the response variable, or simply the response.

Attrition occurs when participants fail to complete all portions of a study. Participants may move, change their phone numbers, or simply become disinterested in participating over time.

A(n) might be as simple as a typo in the data set, which is also known as a processing error. A(n) is a participant who does not follow the instructions for a study. A(n) is a subject who strays from the directions they were given for the study, yet they remain in the sample.

dependent variables

The description of the project is so nebulous and unfocused that the purpose of the research is unclear. The problem is unimportant or unlikely to yield new information. The hypothesis is ill-defined, doubtful, or unsound, or it rests on insufficient evidence. The problem is more complex than the investigator realizes.

Steps for Organizing Your Discussion of Limitations

1. Identify the limitation(s) This part should comprise around 10%-20% of your discussion of limitations.
2. Explain these limitations in detail.
3. Propose a direction for future studies and present alternatives (optional)

Identifying six major weaknesses Inadequate or unfocused topic sentences. Writing off-subject. Failing to anticipate objections. An inadequate conclusion.

This type of experiment allows the researcher to determine not only if the drug is effective but also the effectiveness of different dosages. In the absence of a control group, the researcher’s ability to draw conclusions about the new drug is greatly weakened, due to the placebo effect and other threats to validity.