Psychology Chapter 2

What is the median for the following distribution of numbers: 65 78 78 81 84 92 96 98

82.5

The mean of the date set listed 65 78 78 81 84 92 96 98 is__

84

What is the mode of the following distribution: 63 75 79 82 82 84 84 84 91 99 99?

84

Before conducting an experiment on people, psychologists today are required to submit their plan to a _____

Human subject committee

What is the mean of 47 20 20 14 18 24?

about 24

What is the independent variable of the following statement: melting time of ice vs. amount of sunlight exposure?

amount of sunlight

Another word for the mean is the ________of all the numbers.

average

The mean, median, mode are all measures of _______

central tendency

What is the dependent variable of the following statement: type of bleach on how clean your dirty clothes become?

cleanliness of clothes

The group who receives a placebo in an experiment or study is called the ______group

control

The relationship between two sets of data

correlations

In a _______study, a psychologist organizes individuals into groups based on age.

cross- sectional

In an experiment, a researchers'_____may produce nonrepresentative results. (cues, expectations, techniques, all of the above).

cues, expectations, techniques

The listing and summarizing of data in a practical way is called__________

descriptive statistics

When neither the participant, nor the experimenter, knows which group of participants is the experimental on, the experiment is known as a_______________________

double-blinded

Participants who are exposed to the independent variable are called the ________________group.

experimental

Arranging data so you know how often a score occurs is called the __________

frequency distrubtion

The variable that the experimenter manipulates is called the ______variable.

independent

In a _________study, psychologists study the same gorup of participants at regular intervals over a period of years.

longitudinal

The most commonly used measure of central tendency is the__________

mean

The number that is the average of all the numbers in a data set is called: finding the _________

mean

Locating the middle number in a set of data is called the ___

median

The most frequent score in a data set is called the ______

mode

Avoiding disruption of the participants is a cardinal rule for which research method.

natuarlistic observation

-.42 is an example of which type of correlation?

negative

What type of correlation is : "The more time you spend playing x box related to your GPA?"

negative

What type of correlation is: "Final grade in psychology class and days absent from class?"

negative

What type of correlations is: "Number of time spent practicing your tennis serve and amount of double faults a player has?"

negative

What type of correlations is: "Your grades and the amount of cheeseburgers that you consume?"

none

A symmetrical bell shaped curve is called a _______

normal curve

A _____ is some form of treatment that resembles medical therapy but has no medical effects.

placebo

A change in a participant that results from a belief that the treatment will have an effect.

placebo effect

The total group from which a sample is drawn is the _______

population

What type of correlation is: "Hours spent studying for a test and final grade on the test?"

positive

When the dependent variable increases, as the independent variable increases, the correlations is_____

positive

When the independent and dependent variable both increase, the correlations is______

positive

What type of correlation is: "The more time you brush your teeth related to teeth whiteness?"

positve

This type of sample has everyone having an equal chance of being represented.

random

If you subtract the lowest number in a data set from the highest score, and add one, you are determining the _______

range

The results of the Milgram experiment implies that individuals could easily inflict pain to other if such orders were issued by a ________

respected authority

A graph that demonstrates the direction of the relationship between two variables.

scatterplot

When researchers unwittingly bring about the situation they expected to find, they have created a_________

self-fulfilling prophecy

A measure of variability that describes distance of every score from the means of the scores is the_______

standard deviation

The branch of mathematics used to organize and evaluate a set of data is________

statistics

This type of sample has representatives of various subgroups of the population.

stratified

.97 is an example of which type of correlation?

strong positive

Sampling of data obtained through interviews or questionnaires is called______

survey

Using a ______psychologists obtain information by asking many individuals a fixed set of questions.

survey

A measure of a difference or spread is called the_____

variance

.02 is an example of which type of correlation?

weak postion

Hose does a naturalistic observation differ from a case study?

A naturalistic observation is when you watch the organism in its natural surroundings without them knowing. As case study is investigation on a participant with them knowing and participating in the study.

What is a self fulfilling prophecy? What is on way to avoid it?

When a researchers expectations about the results influences the participants behavior, and therefore, the results of the study. Single-blind and double-blind experiments

What is a negative correlation? Draw a graph showing a possible negative correlation between the amount of insulation in your house and the amount of natural gas used by your furnace.

When the independent is increasing and the dependent is decreasing or the other way around.