Karthik and Sue are lab partners assigned to research who is...

Name: Problem 3, Chapter 2: Barron's AP Psychology
Uploaded: 2021-02-04T05:17:28-08:00
Duration: 5 min 57 s
Channel: Yazeed Hamami
Description: Karthik and Sue are lab partners assigned to research who is friendlier girls or boys. After conversing with their first 10 participants, they find that their friendliness ratings often differ. With which of the following should they be most concerned? (A) reliability (B) confounding variables (D) validity (C) ethics (E) assignment

Karthik and Sue are lab partners assigned to research who is friendlier girls or boys. After conversing with their first 10 participants, they find that their friendliness ratings often differ. With which of the following should they be most concerned? (A) reliability (B) confounding variables (D) validity (C) ethics (E) assignment

Karthik and Sue are lab partners assigned to research who is friendlier girls or boys. After conversing with their first 10 participants, they find that their friendliness ratings often differ. With which of the following should they be most concerned?
(A) reliability
(B) confounding variables
(D) validity
(C) ethics
(E) assignment

Key Concepts

Reliability

Reliability refers to the consistency and stability of a measurement process over time. In research, it reflects whether a study or measurement instrument produces the same results under consistent conditions. When different observers or raters, such as Karthik and Sue, show divergent ratings, it suggests a problem with inter-rater reliability, meaning that the measurements are not consistent regardless of who conducts them.

Transcript

00:01 Yazid hamami and i'm a psychology tutor and today we're looking at the question.

00:04 Karthik and sue are lab partners assigned to research who is friendlier, girls or boys.

00:09 After conversing with their first 10 participants, they find that their friendliness ratings often differ.

00:14 Okay, so there we go.

00:19 So the main thing we're learning is that of these two administrators, they are getting different ratings.

00:29 Now, which of the following should they be most concerned about? so, basically, what this question is asking, what should you be most concerned about in the event of differing ratings among test or study administrators? so the first choice they give us is, oops, sorry about that, a reliability.

00:57 Reliability is basically just saying the accuracy and consistency, i'm sorry about that, of a instrument to measure something.

01:09 Basically, for using a scale metaphor, if you weigh yourself on a weight scale, it should show your weight as being the same one hour apart, probably.

01:21 And if it doesn't, then you're going to say that has a low reliability if it's showing different weights an hour apart.

01:28 So for how this relates to the question, they're not getting consistent friendliness ratings.

01:34 So it could potentially be a, reliability issue where their ratings and the results aren't consistent.

01:40 So we're going to leave that one potentially.

01:43 Let's look at the second answer, b, confounding variables.

01:52 So sorry about that once again.

01:55 So we're going to write that out as confounds...