What is the name for a study in which neither the experimenter nor the participants know who is in the control group and who is in the experimental group?

Blinding techniques are also used to avoid bias. In a single-blind study the participants do not know what treatment groups they are in, but the researchers interacting with them do know. In a double-blind study, the participants do not know what treatment groups they are in and neither do the researchers who are interacting with them directly. Double-blind studies are used to prevent researcher bias. 

Blinding Procedure employed in research to prevent bias in which the participants and/or the researchers interacting with the participations do not know which treatment each case is receiving

Single-Blind Study Research study in which the participants do not know the treatment group that they have been assigned to

Double-Blind Study Research study in which neither the participants nor the researchers interacting with them know which cases have been assigned to which treatment groups

Example: Yogurt Tasting Section

Researchers are comparing a low-fat blueberry yogurt to a high-fat blueberry yogurt. Participants are randomly assigned to receive one type of yogurt. After tasting it, they complete an online survey. The researchers know which yogurt containers are low-fat and which are high-fat, but participants are not told. This is an example of a single-blind study because the researchers know which participants are in the low- and high-fat groups but the participants do not know. A double-blind study may not be necessary in this case since the researchers have only minimal contact with the participants. 

Example: Caffeine Energy Study Section

Researchers want to know if adult males who consume high amounts of caffeine interact more energetically. They obtain a representative sample and randomly assign half of the participants to take a caffeine pill and half to take a placebo pill.  The pills are randomly numbered and coded so at the time the researchers do not know which participants have been given caffeine and which have been given the placebo. All participants are told that they may have been given a caffeine pill. After taking the pill, researchers observe the participants interacting with one another and rate the interactions in terms of level of energy. 

This is a double-blind study because neither the researchers nor the participants know who is in which group at the time the data are collected. After the data are collected, researchers can look at the pill codes to determine which groups the participants were in to conduct their analyses. A double-blind study is necessary here because the researchers are observing and rating the participants. If the researchers know who is in the caffeine group they may be more likely to rate their levels of energy as very high because that is consistent with their hypothesis. 

1) Which of the following occurs at the initial baseline stage in an ABA design?

2) Aetiology is a term:

3) Analogue research involves:

4) Animal models allow research into which of the following?

5) An applied scientist is:

6) Which of the following is true of a scientist-practitioner:

7) A hypotheses is:

8) Which of the following is an acronym for NICE?

9) Prediction refers to which of the following:

10) SPSS is an acronym of the following?

11) Which of the following statements is true of the notion of statistical significance?

12) If something is testable, it involves which of the following?

13) Prevalence rates can be assessed by which of the following questions?

14) The outcome of what is being measured is termed:

15) To avoid experimenter bias, when the experimenter nor the participant is aware of which group the participant is in, this is known as:

16) What is the name of an effect that occurs when an experimental group gets better simply because they are being giving a pill and this leads them to expect to get better?

17) Natural experiments involve:

18) A case study can be used in which of the following circumstances?

19) The external validity of an experiment means that:

20) Which of the following describes a meta-analysis?

21) In an experiment an effect size is:

22) Quantitative methods enable one to:

23) Qualitative methods involved which of the following:

24) Grounded theory is an approach to qualitative analysis. It involves which of the following:

25) During experimentation informed consent should include which of the following:

26) In drug treatment studies, it may be necessary to use deception. This may involve:

27) Those with more complex psychopathologies are likely to be excluded from treatment outcome studies and so denied access to the treatment programme associated with the study. This is referred to as:

28) In psychological research, the term privacy refers to which of the following options:

29) In psychological research the term confidentiality refers to which of the following options:

30) Which of the following would occur in a longitudinal study:

What is the name of the experimental design where neither the experimenter nor the participant know which group they are in?

Is an experiment in which neither the experimenter nor the participants know if the subjects are in the experimental or the control group?

What is a double

Why do a double