Date: Mon, 24 Jan 2011 17:19:43 +0800
Reply-To: Anthony James <luckyantonio2003@yahoo.com>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Anthony James <luckyantonio2003@yahoo.com>
Subject: Re: Chi square or U Test
In-Reply-To: <1295791262641-3353647.post@n5.nabble.com>
Content-Type: text/plain; charset=utf-8
Dear Bruce,
I replied to that mail of you and sent it both to your hotmail and lakeheadu mail. Please consider my new posting. It's the same problem but I have worded it differently which I think is clearer.
I'd be grateful. I badly need this.
Cheers
Anthony
--- On Sun, 1/23/11, Bruce Weaver <bruce.weaver@hotmail.com> wrote:
> From: Bruce Weaver <bruce.weaver@hotmail.com>
> Subject: Re: Chi square or U Test
> To: SPSSX-L@LISTSERV.UGA.EDU
> Date: Sunday, January 23, 2011, 8:01 AM
> Anthony, I see you're posting the
> same question under a new subject. I made
> a guess as to the structure of your data below, but did not
> see a response.
> Note that if you responded to my hotmail address, it is
> used only for
> posting to this list via Nabble, and I don't check it
> regularly--see the
> note in my signature file. So please respond to the
> mailing list.
>
> Bruce
>
>
> Bruce Weaver wrote:
> >
> >
> > Anthony James wrote:
> >>
> >> Dear Colleagues,
> >> I have a research design problem. I'd be thankful
> if you helped.
> >> I read 20 words for 30 cases and asked them to
> tell me the first word
> >> that hits them. I categorized the words generated
> by the participants
> >> under 3 categories of 'related words', 'irrelevant
> words' and
> >> 'synonyms/antonyms'. Then I computed the mean of
> each category over the
> >> 30 cases.
> >>
> >
> > You say you asked the cases to tell you the first word
> that hit them. I
> > take it, then, that cases are subjects (or
> participants) in your study,
> > right?
> >
> > Re the means you computed, I think they are the mean
> number of subjects
> > (or cases) who selected each category, is that right?
> >
> >
> > Anthony James wrote:
> >>
> >> In Phase 2, I give pictures as prompts to
> participants instead of words
> >> and asked them to tell me the first word that hits
> them. I categorized
> >> the words in the same way and computed the means
> of the three categories.
> >>
> >
> > Does Phase 2 use the same subjects (cases) in Phase
> 1?
> >
> >
> >
> > Anthony James wrote:
> >>
> >> Results show that the mean of 'synonyms/antonyms'
> when words are used as
> >> prompts is 19 and its mean is 13 when pictures are
> used as prompts. This
> >> suggests that words generate more
> synonyms/antonyms than pictures. How
> >> can I test the statistical significance of this
> difference? Is
> >> Mann-Whitney U Test the right test?
> >>
> >
> > The Mann-Whitney U test is a rank-based alternative to
> the unpaired (or
> > independent groups) t-test. I.e., it can be used
> when you have two
> > independent groups of observations.
> >
> >
> > Anthony James wrote:
> >>
> >> I can consider all the 3 categories of words and
> the two categories of
> >> picture and run a 2*3 chi square. However chi
> square doesn’t give the
> >> significance of the difference for each category
> separately.
> >> Â
> >> Cheers
> >> Anthony
> >> Â
> >>
> >
> > If you have the same subjects in both phases, then a
> chi-square test of
> > association is out--it requires independence of
> observations.
> >
> > I'll have a guess at what your data look like.
> >
> > Subject Phase Word Category
> > 1Â Â Â Â Â Â 1Â
> Â Â Â 1Â Â Â Â Â 2
> > 1Â Â Â Â Â Â 1Â
> Â Â Â 2Â Â Â Â Â 3
> > 1Â Â Â Â Â Â 1Â
> Â Â Â 3Â Â Â Â Â 1
> > 1Â Â Â Â Â Â 1Â
> Â Â Â 4Â Â Â Â Â 2
> > etc
> > 1Â Â Â Â Â Â 1Â
> Â Â Â 20Â Â Â Â Â 3
> > 2Â Â Â Â Â Â 1Â
> Â Â Â Â Â 1Â Â Â Â
> Â Â Â 1
> > 2Â Â Â Â Â Â 1Â
> Â Â Â Â Â 2Â Â Â Â
> Â Â Â 3
> > etc
> > 2Â Â Â Â Â Â 1Â
> Â Â Â 20Â Â Â Â Â 1
> > etc, including same type of thing with Phase = 2
> >
> > This can be reduced to one row per Subject as
> follows:
> >
> > Subject P1C1Â P1C2Â P1C3Â P2C1 P2C2
> P2C3
> > 1Â Â Â Â Â 8Â Â
> Â Â 7Â Â Â 5Â Â Â
> Â 2Â Â Â Â 10Â Â Â 8
> > 2Â Â Â Â Â 4Â Â
> Â 12Â Â Â 4Â Â Â Â
> 4Â Â Â Â Â 9Â Â Â 7
> > 3Â Â Â Â Â Â 11Â
> Â Â Â Â 3Â Â Â 6Â
> Â Â Â 5Â Â
> Â Â Â 6Â Â Â 9
> > etc
> >
> > Where P1C1 = Phase 1, Category 1; P1C2 = Phase 1,
> Category 2, etc; and the
> > data points are counts of how often that category was
> chosen for each
> > subject. Thus, within a phase, C1, C2, and C3
> must sum to 20.
> >
> > Is this what your data look like?
> >
> >
> >
>
>
> -----
> --
> Bruce Weaver
> bweaver@lakeheadu.ca
> http://sites.google.com/a/lakeheadu.ca/bweaver/
>
> "When all else fails, RTFM."
>
> NOTE: My Hotmail account is not monitored regularly.
> To send me an e-mail, please use the address shown above.
>
> --
> View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Chi-square-or-U-Test-tp3347510p3353647.html
> Sent from the SPSSX Discussion mailing list archive at
> Nabble.com.
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> LISTSERV@LISTSERV.UGA.EDU
> (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the
> command
> INFO REFCARD
>
=====================
To manage your subscription to SPSSX-L, send a message to
LISTSERV@LISTSERV.UGA.EDU (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD
| 
