Question 1

Which of the following best describes the difference between reliability and validity in psychological measurement?

Accepted Answer

Reliability refers to the consistency of measurements across observations or time, while validity refers to the degree to which an instrument accurately measures the intended variable.

Question 2

A researcher wants to study the effect of a new drug on memory. To avoid participant and experimenter bias, which research design should they use?

Accepted Answer

Double-blind study

Question 3

What is the main purpose of operationalizing variables in psychological research?

Accepted Answer

To define variables in measurable and objective terms so they can be tested empirically

Question 4

A study finds a correlation coefficient of $r = -0.85$ between hours of sleep and reported stress levels. What does this indicate?

Accepted Answer

There is a strong negative relationship between hours of sleep and stress levels.

Question 5

Which of the following is an example of participant bias in psychological research?

Accepted Answer

A participant changes their behavior because they know they are being observed.

Question 6

Why is generalizability important in psychological research?

Accepted Answer

It allows researchers to apply findings from a sample to a larger population.

Question 7

A psychology study uses university students as participants to study decision-making in adults. What is a potential limitation of this sampling method?

Accepted Answer

The results may not generalize to the broader adult population.

Question 8

Which of the following best describes the placebo effect?

Accepted Answer

A participant's improvement in health or behavior not due to the medication or treatment, but due to their expectations.

Question 9

In the context of scientific research, what is publication bias?

Accepted Answer

The tendency for journals to publish only studies with significant or positive results, ignoring null or negative findings.

Question 10

A researcher observes children playing in a park without interacting with them or manipulating any variables. What type of research method is being used?

Accepted Answer

Naturalistic observation

Question 11

Which of the following is a key feature of experimental research that distinguishes it from correlational research?

Accepted Answer

It manipulates an independent variable to observe its effect on a dependent variable.

Question 12

A study reports that its results are both objective and reliable. What does this imply about the study's measurements?

Accepted Answer

The measurements are consistent across instruments and observers, and are not influenced by personal bias.

Question 13

Which of the following scenarios best illustrates the concept of validity in psychological measurement?

Accepted Answer

A depression inventory accurately measures the severity of depressive symptoms in patients.

Question 14

A researcher wants to ensure that their findings can be applied to people outside their study sample. Which concept are they most concerned with?

Accepted Answer

Generalizability

Question 15

Which of the following is a technique used to reduce experimenter bias in psychological research?

Accepted Answer

Using double-blind procedures

Question 16

A study is criticized for using a small, non-random sample. What is the most likely consequence of this methodological flaw?

Accepted Answer

The study's results may not accurately represent the larger population.

Question 17

Which of the following best describes the difference between qualitative and quantitative research?

Accepted Answer

Qualitative research examines data without numerical measurements, while quantitative research uses numerical measurements and statistics.

Question 18

A researcher finds a statistically significant correlation between ice cream sales and drowning incidents. What is the most likely explanation for this finding?

Accepted Answer

There is a third variable, such as temperature, that influences both ice cream sales and drowning incidents.

Question 19

Which of the following is an example of publication bias affecting the scientific literature?

Accepted Answer

A journal only publishes studies that report significant findings, ignoring studies with null results.

Question 20

A researcher wants to test whether a new teaching method improves student performance. They randomly assign students to either the new method or the traditional method and compare test scores. Which variable is the independent variable?

Accepted Answer

The teaching method used (new or traditional)

Lecture 2: Reading and Evaluating Scientific Research (Introduction to Psychology)

Study Guide - Practice Questions

Study Guide - Flashcards