WEBVTT 00:00:00.000 --> 00:00:03.493 align:middle line:90% [MUSIC PLAYING] 00:00:03.493 --> 00:00:15.990 align:middle line:90% 00:00:15.990 --> 00:00:16.570 align:middle line:90% Hello. 00:00:16.570 --> 00:00:18.236 align:middle line:84% In this short video, we're going to talk 00:00:18.236 --> 00:00:22.380 align:middle line:84% about how you can calculate alpha reliability using PSPP. 00:00:22.380 --> 00:00:24.220 align:middle line:90% Let's go ahead and get started. 00:00:24.220 --> 00:00:26.340 align:middle line:84% I've gone ahead and opened up the student 00:00:26.340 --> 00:00:30.900 align:middle line:84% data set from the textbook, the Textbook Data Set.sav. 00:00:30.900 --> 00:00:34.710 align:middle line:84% Again, this is going to be used in PSPP. 00:00:34.710 --> 00:00:35.336 align:middle line:90% It's very easy. 00:00:35.336 --> 00:00:36.793 align:middle line:84% So, what we're going to do is we're 00:00:36.793 --> 00:00:39.060 align:middle line:84% going to go ahead and calculate it using communication 00:00:39.060 --> 00:00:41.860 align:middle line:84% apprehension as the variable that we are going to use. 00:00:41.860 --> 00:00:45.610 align:middle line:84% So, we're going to use all 24 items to do this. 00:00:45.610 --> 00:00:47.980 align:middle line:84% So, that's all of these different items. 00:00:47.980 --> 00:00:49.920 align:middle line:84% These are all the scale items for each 00:00:49.920 --> 00:00:52.980 align:middle line:84% and every individual participant that we have in our data set. 00:00:52.980 --> 00:00:54.720 align:middle line:84% It's actually very easy to do this. 00:00:54.720 --> 00:00:57.330 align:middle line:84% You're going to go up to Analyze, 00:00:57.330 --> 00:01:00.824 align:middle line:84% you're going to scroll down to Reliability, 00:01:00.824 --> 00:01:03.240 align:middle line:84% and then you're going to get this Reliability pop-up menu. 00:01:03.240 --> 00:01:05.615 align:middle line:84% And I'm going to go ahead and make it a little bit larger 00:01:05.615 --> 00:01:07.020 align:middle line:90% just so that you can see things. 00:01:07.020 --> 00:01:09.300 align:middle line:84% So, to do this, the easiest way to do it 00:01:09.300 --> 00:01:13.020 align:middle line:84% is to click on the first one, hold the Shift key, 00:01:13.020 --> 00:01:17.515 align:middle line:84% and then scroll down till you get to the last one of these, 00:01:17.515 --> 00:01:18.390 align:middle line:90% which is right there. 00:01:18.390 --> 00:01:21.532 align:middle line:84% And then you can shift all of them over at once. 00:01:21.532 --> 00:01:23.490 align:middle line:84% Now, I'm going to go ahead and click Reset just 00:01:23.490 --> 00:01:25.380 align:middle line:90% so I can show you that again. 00:01:25.380 --> 00:01:27.339 align:middle line:84% You could also do them individually, like this. 00:01:27.339 --> 00:01:28.963 align:middle line:84% But again, that's going to take longer. 00:01:28.963 --> 00:01:31.370 align:middle line:84% So I'm going to go ahead and just click that first one. 00:01:31.370 --> 00:01:34.200 align:middle line:84% Now I'm going to go down here to the 24, click it over, 00:01:34.200 --> 00:01:37.060 align:middle line:84% and now you'll see that now I have all 24 of those items 00:01:37.060 --> 00:01:38.330 align:middle line:90% now sent over. 00:01:38.330 --> 00:01:41.130 align:middle line:84% At this point, all you have to do is click OK. 00:01:41.130 --> 00:01:44.700 align:middle line:84% And here is what your results look like in PSPP. 00:01:44.700 --> 00:01:47.250 align:middle line:84% And now notice, it's going to have the same information 00:01:47.250 --> 00:01:49.170 align:middle line:84% that it would if it was in SPSS, but it 00:01:49.170 --> 00:01:50.672 align:middle line:90% is going to look differently. 00:01:50.672 --> 00:01:52.380 align:middle line:84% So the first thing you're going to notice 00:01:52.380 --> 00:01:56.550 align:middle line:84% is, again, we had 644 participants out of the 654, 00:01:56.550 --> 00:01:58.590 align:middle line:84% which means we had 10 participants who 00:01:58.590 --> 00:02:02.310 align:middle line:84% did not complete the PRCA 24 completely. 00:02:02.310 --> 00:02:04.840 align:middle line:90% That happens in any data set. 00:02:04.840 --> 00:02:07.194 align:middle line:84% So that's the first number in what you get out of there. 00:02:07.194 --> 00:02:08.610 align:middle line:84% The second one down here is we can 00:02:08.610 --> 00:02:10.169 align:middle line:84% see what our alpha reliability is-- 00:02:10.169 --> 00:02:14.370 align:middle line:84% or the Cronbach's Alpha is 0.94, which is considered excellent. 00:02:14.370 --> 00:02:17.010 align:middle line:84% And of course, it has the number of items right there. 00:02:17.010 --> 00:02:18.670 align:middle line:84% And that's all that it takes to run 00:02:18.670 --> 00:02:21.540 align:middle line:90% alpha reliability using PSPP. 00:02:21.540 --> 00:02:24.890 align:middle line:90% [MUSIC PLAYING] 00:02:24.890 --> 00:02:35.966 align:middle line:90%