Question 1

Which of the following best describes the difference between objective and subjective measurements in scientific research?

Accepted Answer

Objective measurements are consistent across instruments and observers, while subjective measurements rely on personal interpretation.

Question 2

A researcher wants to ensure that their instrument measures what it is supposed to measure. Which concept are they most concerned with?

Accepted Answer

Validity

Question 3

Which of the following is an example of a technique used to reduce participant bias in a psychological study?

Accepted Answer

Conducting a double-blind study

Question 4

A study finds that people who eat more ice cream tend to have more sunburns. What type of research design does this best illustrate?

Accepted Answer

Correlational research

Question 5

Which of the following best defines generalizability in scientific research?

Accepted Answer

The degree to which results can be applied to other people or situations

Question 6

A psychologist is conducting an experiment to test whether a new drug improves memory. To control for the placebo effect, what should the researcher do?

Accepted Answer

Use a double-blind procedure

Question 7

Which of the following is a potential consequence of publication bias in scientific research?

Accepted Answer

Only studies with significant or positive results are likely to be published, skewing the scientific literature

Question 8

If a measurement tool gives similar results every time it is used under the same conditions, it is said to have high:

Accepted Answer

Reliability

Question 9

A researcher observes children playing in a park without interacting with them or manipulating any variables. This is an example of:

Accepted Answer

Naturalistic observation

Question 10

Which of the following equations best represents the correlation coefficient, which measures the strength and direction of a linear relationship between two variables?

Accepted Answer

$r = \frac{\sum (x_i - \bar{x})(y_i - \bar{y})}{\sqrt{\sum (x_i - \bar{x})^2 \sum (y_i - \bar{y})^2}}$

Question 11

A psychology study uses only undergraduate students as participants. Which of the following is a potential problem with this sampling method?

Accepted Answer

It may limit the generalizability of the findings to the broader population

Question 12

Which of the following best describes the placebo effect?

Accepted Answer

A change in health or behavior due to a participant's expectations rather than the treatment itself

Question 13

In a double-blind study, who is unaware of the group assignments?

Accepted Answer

Both the participants and the researchers

Question 14

Which of the following is an example of a qualitative research method?

Accepted Answer

Conducting in-depth interviews to explore participants' experiences

Question 15

A researcher wants to test if a new teaching method causes better exam performance. Which research design should they use?

Accepted Answer

Experimental research

Question 16

Which of the following is a key feature of peer-reviewed journals in scientific research?

Accepted Answer

Articles are evaluated by experts in the field before publication

Question 17

If a study's results are consistent across different observers and instruments, but do not accurately measure the intended variable, the study has:

Accepted Answer

Low validity and high reliability

Question 18

Which of the following best illustrates publication bias?

Accepted Answer

A journal publishes only studies that show a significant effect, ignoring studies with null results

Question 19

A researcher is interested in the relationship between stress and academic performance. Which statistical method would be most appropriate to analyze the strength and direction of this relationship?

Accepted Answer

A correlation coefficient

Question 20

Which of the following is the correct formula for calculating the mean of a set of scores $x_1, x_2, ..., x_n$?

Accepted Answer

$\bar{x} = \frac{\sum_{i=1}^{n} x_i}{n}$

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

Study Guide - Practice Questions

Study Guide - Flashcards