Expirament Design

Question 1

experiment design

Answer 1

a technique to efficiently assess the effect of multiple inputs, or factors, on measures of performance, or responses

Question 2

Probability Sampling

Answer 2

Every individual has a known non-zero chance of being selected

Question 3

Convenience Sampling

Answer 3

Picked based on ease of access

Question 4

Randomization

Answer 4

Assigning participants to experimental or control group purely by chance

Question 5

Matching

Answer 5

Pairing or grouping participants based on shared characteristics before assigning them to groups

Question 6

Internal Invalidity

Answer 6

A lack of confidence that the observed effect is truly cause by the independent variable
Did the treatment really cause the effect?

Question 7

External Invalidity

Answer 7

A lack of confidence that the results can be generalized beyond the study sample or setting
Can findings be applied to other people/settings/times?

Question 8

Experimental Studies

Answer 8

a study in which a treatment, procedure, or program is intentionally introduced and a result or outcome is observed.

Question 9

One shot case study

Answer 9

There is no pretest
identifies the extent and nature of cause-and-effect relationships between two or more variables

Question 10

Classical Experiment

Answer 10

requires a control group
uses random assignment, an experimental and control group, as well as pre- and posttesting

Question 11

Static group testing

Answer 11

• no randomization/treatment
• a software testing method that examines a program – along with any associated documents – but does not require the program to be executed

Question 12

Natural Experiments

Answer 12

an observational study where researchers observe naturally occurring events or changes, rather than actively manipulating them, to study the impact of a treatment or intervention

Question 13

One group pretest-postest

Answer 13

a research design where a single group of participants is assessed before and after an intervention, with no control group for comparison

Question 14

Strength to Experiment

Answer 14

• causal clarity
• can be repeated
• reduces bias
• controlled environment

Question 15

Weakness to Experiment

Answer 15

artificiality
- not reflective of the real world

Question 16

The classical experiment design helps guard against

Answer 16

the sources of internal invalidity

Question 17

An experiment examines the effect of the ____ variable on the _____ variable.

Answer 17

independent
dependent

Question 18

one group pretest-postest

Answer 18

• survey before the treatment
• admins the treatment
  -survey after the treatment

Question 19

In experiment research is to find causal relationships

Answer 19

• the representatives of a sample is less important