Help with repeated anova = 2 sided - code would be so appreciated.

mgrzyb — Thu, 05 Jul 2018 05:09:14 GMT

Hi. I am sorry to bother you!

But I am in the process of learning several things.

I have a data set with 20 repeated measures (S1-s20), and I just want to do an ANOVA with repeated measures. My code is below. (There has to be simpler way on how to code that.) I have 2 groups - those who play video games and those who do not play games.

I did the proc mixed to test for the trend and interactions already - I get that part.

But many of the publications I am reading did a 1-way ANOVA by gaming status. I did a 2-way analysis by the long way. (the code is below).

1. I have attached how the datasets are set up - those for who play games and those who do not.

2. I have attached my results (on the loose-leaf scanned sheet.

My questions:

1. Is there an easier way to do this - see code below? I just want to stratify by gaming status (no proc GLM at this time).

2. After looking at the loose-leaf results (NOgamers and GAMERS), I have the mean, SD and p-value where SX-S1, DO I NEED TO DIVIDE THE P-VALUE by 19? I think so, but my gut says there is an easier way to do this and a more accurate way.

3. What if I want to test the differences by S2-S1, S3-S2, S4-S3, …. S20-S19 for each group? Could someone help me with that code just using each stratum individually? All the other publications have that.

Personally, I think these type of analyses are not required b/c PROC MIXED using GAMINGSTATUS and SIM score should be used.

But please help me.

Thank you, Kindly!

Mava

Here is my code: * I tried to attach 2 attachments, but I think only 1 went through. So I will include my:

1. Code

2. dataset by gaming status

1. CODE

/* 2-sided from sX- x1 */

proc ttest data= elina.widenogamer; paired s2*s1; run;
proc ttest data= elina.widenogamer; paired s3*s1; run;
proc ttest data= elina.widenogamer; paired s4*s1; run;
proc ttest data= elina.widenogamer; paired s5*s1; run;
proc ttest data= elina.widenogamer; paired s6*s1; run;
proc ttest data= elina.widenogamer; paired s7*s1; run;
proc ttest data= elina.widenogamer; paired s8*s1; run;
proc ttest data= elina.widenogamer; paired s9*s1; run;
proc ttest data= elina.widenogamer; paired s10*s1; run;
proc ttest data= elina.widenogamer; paired s11*s1; run;
proc ttest data= elina.widenogamer; paired s12*s1; run;
proc ttest data= elina.widenogamer; paired s13*s1; run;
proc ttest data= elina.widenogamer; paired s14*s1; run;
proc ttest data= elina.widenogamer; paired s15*s1; run;
proc ttest data= elina.widenogamer; paired s16*s1; run;
proc ttest data= elina.widenogamer; paired s17*s1; run;
proc ttest data= elina.widenogamer; paired s18*s1; run;
proc ttest data= elina.widenogamer; paired s19*s1; run;
proc ttest data= elina.widenogamer; paired s20*s1; run;

2. Data set : I only included NON-GAMERS, but it looks the same for gamers.

Version:1.0 StartHTML:000000278 EndHTML:000046968 StartFragment:000035246 EndFragment:000046936 StartSelection:000035246 EndSelection:000046936 SourceURL:file:///C:/Users/Mary%20Grzybowski/AppData/Local/Temp/SAS%20Temporary%20Files/_TD628_DESKTOP-SC2ACST_/sashtml21.htmSAS Output

Play NO Games

19	59	30	71	55	69	59	64	71	52	54	64	67	50	66	41	51	56	73	64	75	No
23	63	67	41	64	61	27	67	71	76	68	78	75	60	64	62	65	54	83	72	60	No
24	46	30	45	53	29	51	48	65	54	29	46	53	62	28	27	38	37	40	65	65	No
25	68	56	50	43	63	54	42	27	61	68	68	60	43	59	38	61	54	67	30	75	No
26	75	76	81	82	75	71	75	71	79	79	82	79	85	84	72	80	77	82	72	77	No
28	72	49	49	58	25	52	68	60	42	57	67	54	70	69	42	68	74	68	72	76	No
15	58	58	39	43	80	71	53	49	34	33	54	57	40	53	55	36	56	23	67	58	No
16	57	61	62	42	59	76	69	66	38	78	71	64	66	64	75	79	72	67	67	66	No
17	63	39	65	58	57	52	47	57	62	52	40	62	54	65	63	61	52	45	49	61	No
18	58	58	58	55	52	69	68	64	67	80	68	71	75	83	57	52	78	64	68	73	No
20	63	65	43	43	24	23	25	21	35	41	42	58	51	61	50	55	40	59	56	46	No
21	62	64	69	79	84	83	74	73	87	71	85	78	80	74	65	76	83	75	77	89	No
22	44	67	69	82	75	78	75	44	90	75	79	80	73	74	73	84	81	83	82	73	No
27	63	62	68	77	72	65	67	66	60	85	58	90	75	81	72	76	78	74	74	70	No
29	67	56	53	60	37	67	23	68	52	63	68	34	28	39	62	36	65	52	62	56	No

However, I attached my results (on the loose-leaf paper) and I think that is the only that went through.

Re: Help with repeated anova = 2 sided - code would be so appreciated.

pau13rown — Thu, 05 Jul 2018 05:51:57 GMT

you seem to have the right instinct eg you mention 'mixed modelling' and repeated measures anova but then you go astray. I did a quick google search, so this might not be the best example, but these data have the same structure as yours, thus their code is instructive: https://stats.idre.ucla.edu/sas/faq/how-can-i-perform-a-repeated-measures-anova-with-proc-mixed/

if you want to do something really 'simple' then maybe a friedman test

Re: Help with repeated anova = 2 sided - code would be so appreciated.

mgrzyb — Thu, 05 Jul 2018 05:55:24 GMT

Thank you. I have that paper and have been following it. I just don't think that, like the other papers, who analyzed multiple simulation scores without "gaming status" is correct. But that is what the investigators want - that is, if S1 differes from s2, etc. I just think that's bad statistics. Thank you kindly!

Re: Help with repeated anova = 2 sided - code would be so appreciated.

PaigeMiller — Thu, 05 Jul 2018 13:35:55 GMT

proc ttest data= elina.widenogamer; paired s2*s1; run;
proc ttest data= elina.widenogamer; paired s3*s1; run;
proc ttest data= elina.widenogamer; paired s4*s1; run;
proc ttest data= elina.widenogamer; paired s5*s1; run;
proc ttest data= elina.widenogamer; paired s6*s1; run;

Performing PROC TTEST will use a different error term than a proper repeated measures analysis, and so I don't think PROC TTEST will give the right results here. In addition, the ability to compare difference S2–S1 and S3–S2 and so forth ought to be possible in GLM or MIXED.

19	59	30	71	55	69	59	64	71	52	54	64	67	50	66	41	51	56	73	64	75	No
23	63	67	41	64	61	27	67	71	76	68	78	75	60	64	62	65	54	83	72	60	No
24	46	30	45	53	29	51	48	65	54	29	46	53	62	28	27	38	37	40	65	65	No
25	68	56	50	43	63	54	42	27	61	68	68	60	43	59	38	61	54	67	30	75	No
26	75	76	81	82	75	71	75	71	79	79	82	79	85	84	72	80	77	82	72	77	No
28	72	49	49	58	25	52	68	60	42	57	67	54	70	69	42	68	74	68	72	76	No
15	58	58	39	43	80	71	53	49	34	33	54	57	40	53	55	36	56	23	67	58	No
16	57	61	62	42	59	76	69	66	38	78	71	64	66	64	75	79	72	67	67	66	No
17	63	39	65	58	57	52	47	57	62	52	40	62	54	65	63	61	52	45	49	61	No
18	58	58	58	55	52	69	68	64	67	80	68	71	75	83	57	52	78	64	68	73	No
20	63	65	43	43	24	23	25	21	35	41	42	58	51	61	50	55	40	59	56	46	No
21	62	64	69	79	84	83	74	73	87	71	85	78	80	74	65	76	83	75	77	89	No
22	44	67	69	82	75	78	75	44	90	75	79	80	73	74	73	84	81	83	82	73	No
27	63	62	68	77	72	65	67	66	60	85	58	90	75	81	72	76	78	74	74	70	No
29	67	56	53	60	37	67	23	68	52	63	68	34	28	39	62	36	65	52	62	56	No

19	59	30	71	55	69	59	64	71	52	54	64	67	50	66	41	51	56	73	64	75	No
23	63	67	41	64	61	27	67	71	76	68	78	75	60	64	62	65	54	83	72	60	No
24	46	30	45	53	29	51	48	65	54	29	46	53	62	28	27	38	37	40	65	65	No
25	68	56	50	43	63	54	42	27	61	68	68	60	43	59	38	61	54	67	30	75	No
26	75	76	81	82	75	71	75	71	79	79	82	79	85	84	72	80	77	82	72	77	No
28	72	49	49	58	25	52	68	60	42	57	67	54	70	69	42	68	74	68	72	76	No
15	58	58	39	43	80	71	53	49	34	33	54	57	40	53	55	36	56	23	67	58	No
16	57	61	62	42	59	76	69	66	38	78	71	64	66	64	75	79	72	67	67	66	No
17	63	39	65	58	57	52	47	57	62	52	40	62	54	65	63	61	52	45	49	61	No
18	58	58	58	55	52	69	68	64	67	80	68	71	75	83	57	52	78	64	68	73	No
20	63	65	43	43	24	23	25	21	35	41	42	58	51	61	50	55	40	59	56	46	No
21	62	64	69	79	84	83	74	73	87	71	85	78	80	74	65	76	83	75	77	89	No
22	44	67	69	82	75	78	75	44	90	75	79	80	73	74	73	84	81	83	82	73	No
27	63	62	68	77	72	65	67	66	60	85	58	90	75	81	72	76	78	74	74	70	No
29	67	56	53	60	37	67	23	68	52	63	68	34	28	39	62	36	65	52	62	56	No

topic Re: Help with repeated anova = 2 sided - code would be so appreciated. in Statistical Procedures

Help with repeated anova = 2 sided - code would be so appreciated.

Re: Help with repeated anova = 2 sided - code would be so appreciated.

Re: Help with repeated anova = 2 sided - code would be so appreciated.

Re: Help with repeated anova = 2 sided - code would be so appreciated.

19	59	30	71	55	69	59	64	71	52	54	64	67	50	66	41	51	56	73	64	75	No
23	63	67	41	64	61	27	67	71	76	68	78	75	60	64	62	65	54	83	72	60	No
24	46	30	45	53	29	51	48	65	54	29	46	53	62	28	27	38	37	40	65	65	No
25	68	56	50	43	63	54	42	27	61	68	68	60	43	59	38	61	54	67	30	75	No
26	75	76	81	82	75	71	75	71	79	79	82	79	85	84	72	80	77	82	72	77	No
28	72	49	49	58	25	52	68	60	42	57	67	54	70	69	42	68	74	68	72	76	No
15	58	58	39	43	80	71	53	49	34	33	54	57	40	53	55	36	56	23	67	58	No
16	57	61	62	42	59	76	69	66	38	78	71	64	66	64	75	79	72	67	67	66	No
17	63	39	65	58	57	52	47	57	62	52	40	62	54	65	63	61	52	45	49	61	No
18	58	58	58	55	52	69	68	64	67	80	68	71	75	83	57	52	78	64	68	73	No
20	63	65	43	43	24	23	25	21	35	41	42	58	51	61	50	55	40	59	56	46	No
21	62	64	69	79	84	83	74	73	87	71	85	78	80	74	65	76	83	75	77	89	No
22	44	67	69	82	75	78	75	44	90	75	79	80	73	74	73	84	81	83	82	73	No
27	63	62	68	77	72	65	67	66	60	85	58	90	75	81	72	76	78	74	74	70	No
29	67	56	53	60	37	67	23	68	52	63	68	34	28	39	62	36	65	52	62	56	No