PSYC3070: Statistics for the Behavioral Sciences

Over the next few course meetings we’ll be working on descriptive statistics. The content for that information can be found in the following chapters of your textbook: 1, 2, 5, & 6.  You will find suggested homework (HW) problems for these chapters on the “content” page. Check the nav bar on the right side of your monitor for the link to that page.

After we finish this material (all review for you guys), we’ll move on to another chapter and 1/2 before exam #1.

Let’s plan on going over our homework tomorrow, we’ll do it (if applicable in SPSS). You should find a handout for Independent and Dependent problems on the content page or in the podcast.

See you all tomorrow… hopefully prepared to get some work one this time.

At this time I’d like to see us take the test on Tuesday. There is no reason we shouldn’t be ready.

Do the following two problems as both independent and dependent designs… You may need to use a little imagination to get the context right, but I believe those of you that have been in class with me can do it!

Ten politically active individuals are selected, all of whom label themselves as liberal. Each is attached to a physiograph, and heart rate is recorded while a sequence of 20 slides is projected on a screen at which the participant is looking. Half of the slides are pictures of famous individuals without any expressed political philosophy; the other half are known conservatives. The arrangement of the slides is random. Each participant receives two scores: The first is the average heart rate during exposure to the neutral slides, and the second is the average heart rate during exposure to the conservative slides. The data are shown here. Does reaction to the slides differ?

Neutral Conservative
65.3       71.8
75.7       73.5
85.6       99.3
73.7       81.7
69.5       75.7
68.2       73.5
70.1       79.8
72.5       70.3
71.0       85.3
83.5       107.1

Thirty-two students are randomly selected from a large introductory class and are randomly and evenly assigned to one of two groups. Each participant is given four 15-second exposures to a list of 15 nouns. After 30 minutes, each participant in one group is given a free recall test, whereas each participant in the other group is given a recognition test. The results in terms of the number of words correctly retained are shown here. Compare the groups. (The data is shared using frequency counts. Makes sure everything adds up as N is reported in thE first part of the problem statement.)

Recognition     Recall

X    f                X    f

15  6               4   1
14  1               2   5
13  4               1   7
12  2               0   3
10  1
8    1
6    1

you should be finishing up your HW from the book on chapters 1, 2, 5, 6, and 8. Additionally, you should complete the extra descriptive HW. On Tuesday we will try to import some data and solve your descriptive HW using SPSS.

Be sure and visit the Library to go over the SPSS tutorial… the first 4 will take you a very long way.

Here’s the HW we worked on together the last tiem we got together. Make sure your HW is correct by checking these numbers. If you were there then you’ll know what HW goes with what output… or just check the labels.

this link goes to my website… if the SPSS output looks funny try a differnt browser, SPSS created the HTML code.

Here is the output we created together last week in SPSS.

Use it to check your HW solutions and review where the relevant data is found.

This will only stay up for a while, so this link will be dead at the end of the semester:

Let’s see if we can get this to download:

http://radar.ngcsu.edu/~clrobertson/links/ANOVA_HW.sav

Scholars,

Check your podcast feed for homework assignments… should be labeled something to the tune of HW module 2.0, 2.1, and 2.2

We will solve these problems together by hand, then solve them using SPSS. The image is complete and I will start updating our lab computers in a few minutes.

Might wanna bring the questions with you for class on Monday afternoon / Tuesday morning.

Turn on a laptop and open SPSS

Go through tutorials 1-4

Complete HW module 1.0 by gettign the data from this website into SPSS. Save it.

Put your HW module 1.1 data into SPSS. Save it.

Email the data (.sav file) to yourself for later use.

Power down the computer CORRECTLY!

Congratulations, that was a great introduction to the software.

Stat Scholars,

I have added lecture slides and some homework assignments to our podcast channel… you should try aggregating it now so we have plenty of time to solve you individual problems.

Here is the one click URL if you have iTunes installed on your machine.

Here is the direct url: http://podcasting.gcsu.edu/4dcgi/podcasting/ngcsu/channels19375/9318.xml