What Greek philosopher believed that the heart is the source of our personality?
The heart has played an important role in understanding the body since antiquity. In the fourth century B. C., the Greek philosopher Aristotle identified the heart as the most important organ of the body, the first to form according to his observations of chick embryos.
Which of the following enables more exact descriptions of ongoing behaviors without explaining them?
Which of the following facilitates more exact descriptions of ongoing behaviors without explaining them? Naturalistic observation.
Which perspective in psychology is most likely to focus on how behavior and thinking vary across situations?
Is a group participating in an experiment that receives no treatment group of answer choices?
Control groups in experiments The treatment group (also called the experimental group) receives the treatment whose effect the researcher is interested in. The control group receives either no treatment, a standard treatment whose effect is already known, or a placebo (a fake treatment).
In which type of research would an investigator manipulate one factor?
What is a group participating in an experiment that receives no treatment?
The control group is composed of participants who do not receive the experimental treatment. When conducting an experiment, these people are randomly assigned to be in this group. They also closely resemble the participants who are in the experimental group or the individuals who receive the treatment.
How do you choose the size of a control group?
Rule #1: Your control group shouldn’t be too big. Or too small. First, your control group should be about 10% of the total group of eligible customers. The last thing you want to do is have your revenue go to zero because you dropped 90% of your customers out of a promotion.
Why does a good experiment include a control group?
Inclusion of a control group greatly strengthens researchers’ ability to draw conclusions from a study. A typical use of a control group is in an experiment in which the effect of a treatment is unknown and comparisons between the control group and the experimental group are used to measure the effect of the treatment.
How do you control an experiment?
In a controlled experiment, all variables other than the independent variable are controlled or held constant so they don’t influence the dependent variable. Controlling variables can involve: holding variables at a constant or restricted level (e.g., keeping room temperature fixed).
What is the benefit of using controls in an experiment?
Controls eliminate alternate explanations of experimental results, especially experimental errors and experimenter bias.
Why is it necessary to have positive and negative controls in this experiment?
It is necessary to have positive and negative controls in an experiment to ensure that the results are due to the independent variable.