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Question :
151. Marcy trying to define anxiety in a way that

151. Marcy is trying to define *anxiety* in a way that can be empirically tested. She is attempting to find an appropriate _____________.

a) hypothesis

b) operational definition

c) double-blind study

d) theory

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152. Adaris has always been drawn to the saying “Absence makes the heart grow fonder,” and she decides to incorporate this saying into her research project. Adaris is trying to define *absence* in a way that can be empirically tested. She is attempting to find an appropriate ______________.

a) hypothesis

b) operational definition

c) double-blind study

d) theory

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153. A variable that the experimenter manipulates is called a(n) _____________.

a) coefficient of correlation

b) dependent variable

c) control condition

d) independent variable

** **154. Independent variable is to dependent variable as ________.

a) effect is to confound

b) experimental is to correlation

c) measure is to manipulate

d) manipulate is to measure

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155. In a laboratory, smokers are asked to “drive” using a computerized driving simulator equipped with a stick shift and a gas pedal. The objective is to maximize the distance covered by driving as fast as possible on a winding road while avoiding rear-end collisions. Some of the participants smoke a real cigarette with nicotine immediately before climbing into the driver’s seat. Others smoke a fake cigarette without nicotine. You are interested in comparing how many collisions the two groups have. In this study, the *independent variable* is _______________.

a) the use of nicotine

b) the use of a driving simulator

c) the number of collisions

d) the driving skills of each driver

** **156. A researcher is investigating the effects of exercise on weight. What are the independent and dependent variables in this experiment?

a) The dependent variable is weight; the independent variable is exercise.

b) The independent variable is calories consumed; the dependent variable is diet.

c) The independent variable is weight; the dependent variable is calories consumed.

d) The dependent variable is amount of exercise; the independent variable is calories consumed.

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157. In order to increase typing speed, Minisoft has redesigned its keyboard and provided a chime that is related to typing speed. The company wants to know if its innovations affect typing speed. Identify the independent and dependent variables in this proposed study.

a) The dependent variable is the chime; the independent variables are the chime and typing speed.

b) The dependent variable is speed of typing; the independent variables are the keyboard design and the

chime.

c) The dependent variable is keyboard design; the independent variables are the speed of typing and the

chime.

d) The dependent variable is the number of errors made; the independent variables are the chime and the

speed of typing.

** **158. Dr. Keller has individuals run on a treadmill for 0, 15, or 30 minutes and then measures their self-reported mood. In this hypothetical study, the independent variable is

a) the self-reported mood.

b) the individuals who run for 15 or 30 minutes.

c) the individuals who run for 0 minutes.

d) the number of minutes individuals run on the treadmill.

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159. Dr. Proverse has individuals cycle on stationary bikes for 0, 10, 20, or 30 minutes after which he measures their self-reported mood. In this hypothetical study, the dependent variable is

a) the self-reported mood.

b) the individuals who do not ride on the stationary bike.

c) the number of minutes individuals ride the bike.

d) the riding of bikes.

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160. In a laboratory, smokers are asked to “drive” using a computerized driving simulator equipped with a stick shift and a gas pedal. The objective is to maximize the distance covered by driving as fast as possible on a winding road while avoiding rear-end collisions. Some of the participants smoke a real cigarette immediately before climbing into the driver’s seat. Others smoke a fake cigarette without nicotine. You are interested in comparing how many collisions the two groups have. In this study, the *dependent variable* is ____________________.

a) the use of nicotine

b) the use of a driving simulator

c) the number of collisions

d) the driving skills of each driver