Exam 2: Psychologys Scientific Method

Given the following data set,calculate the mean,and discuss why the mean in this case is,or is not,the best measure of central tendency. 12,16,11,2,44,15

In the context of psychological research methods,a _____ presents a standard set of questions,or items,to obtain people's self-reported attitudes or beliefs about a particular topic.

Brian wants to study how toddlers tackle difficult situations by themselves in their parents' absence.While observing the children in a playground,Brian helps Timmy,a two-year-old,tie his shoelace.This is an example of

_____ occurs when the behavior of participants in an experiment is influenced by how they think they are supposed to behave or by their expectations about what is happening to them.

In descriptive statistics,range is a measure of

In the context of psychology's scientific method,theory is defined as

Researchers sometimes use procedures with animals that would be unethical with humans.

In the context of a correlational study,what does the positive or negative sign of a correlation coefficient indicate?

The placebo effect in an experimental study refers to the

In which of the following cases is Dr.Williams establishing an operational definition?

Describe the placebo effect.Provide an example to explain how this effect works.

What is an operational definition? Explain its importance in the field of psychology.

In the context of research settings,researchers who use _____ attempt to view behavior without disturbing the environment.

_____ is a measure of dispersion that indicates how much the scores in a sample vary around the mean of the sample.

What does the magnitude of a correlation coefficient indicate about the variables in a correlational study?

In the context of correlational research,when a correlation coefficient is positive,it means that one variable caused another variable to occur.

In a set of numbers,the mode is the number that divides the distribution in half when the numbers are arranged from lowest to highest.

A _____ design is a special kind of systematic observation,used by correlational researchers,that involves obtaining measures of the variables of interest in multiple waves over time.

In inferential statistics,_____ means that the differences observed between two groups are large enough that it is highly unlikely that those differences are merely due to chance.

A history class of 50 students has agreed to be the subject of a research study.Half of the class has been asked to study for the next history test while listening to classical music.The remaining half has been asked to study in a completely silent environment.The test scores of the two groups will be compared at the end of the experiment.In this experiment,which of the following is the dependent variable?