我自己已经分析了全部

但是有些分析实在是解释不清楚

哪个高人帮我指点下

请加我QQ：237283202(注明：SPSS) 或者MSN：cleckonionky@hotmail.co.uk

题目如下：（文档数据我无法上传，请直接加我Q或MSN）

题目1：Use data set “SHSM001 assignment stress and performance.sav”
There is a great deal of literature pointing to the negative impact of stress on performance in sport.
Less is known about the impact of social influences on this relationship. With this in mind, there is
an emerging literature focussing on what has been termed “social support.” It is believed that social
support protects or “buffers” the negative impact of stress on performance. In other words, stress
only has a negative impact on performance for those people who have low levels of social support.
In this study, data were collected from 119 golfers before and during an important competition. The
dependent variable was performance score in golf (labelled “performance”). In golf, lower scores
represent fewer shots taken; lower scores for the dependent variable therefore represent better
performance. The key independent variable was level of stress (labelled “stress”), assessed by
average heart rate over the 18 holes, but taken at critical points of putting performance over the
course of the competition round. In line with recent psychosocial theories, the golfers were also
asked to rate the level of help and support they received from their caddies (caddies carry the
golfers’ equipment and can offer advice and assistance) during the round (labelled “support”). These
supportive behaviours were assessed using a scale with questions similar to those in many social
support measures, and scores were averaged to range from 1 to 5, with 1 signifying low levels of
supportive behaviours and 5 signifying high levels of supportive behaviours (there are a number of
questions and subscales on this measure, but for simplicity mean scores have already been
calculated for you, so there are values with decimal places).
There are three things you can test with these data:
1. What is the effect of stress on performance?
2. What is the effect of supportive behaviours on performance?
3. What is the combined influence stress and supportive behaviours on performance? We
would hypothesise that stress would be associated with worse performance; supportive
behaviours would be associated with better performance. It was also hypothesised that the
impact of stress on performance might be dependent on the level of supportive behaviours.
To test these hypotheses, you need to run a moderated hierarchical regression analysis on the
data and test for main and interactive effects.
Moderated hierarchical regression analysis will test for the following:
1) whether stress is associated with a main effect on performance (positive or negative)
2) whether supportive behaviours are associated with a main effect on performance (positive or
negative)
3) whether there is an interactive effect of stress and supportive behaviours on performance
(Note: if so, you would need to graph this interaction to allow you to interpret it)
Please note. Bear in mind the original question: to examine whether stress leads to worse
performance, and whether supportive behaviours protect people from the negative impact of high
levels of stress on performance.

题目2：For this section there is a set of data overleaf that you must enter into SPSS.
The prevalence of overweight and obesity is increasing, and many exercise and diet-related
interventions are being evaluated for efficacy in combating this health problem. In the present study,
a sample of 30 participants of differing age and height was assessed for weight at three different
time points (Winter 2006, Summer 2007, and Winter 2007). The 30 participants were also split into
three intervention groups. The dependent variable was weight in pounds (lbs). The following
intervention conditions were employed:
1. Exercise and weight loss information sent to participants’ homes on a weekly basis. This
information detailed the health benefits of exercise and a balanced diet.
2. As Condition 1 (Exercise and weight loss information sent to participants’ homes on a
weekly basis. This information detailed the health benefits of exercise and a balanced diet),
plus a weekly exercise and weight loss management class delivered by trained health
professionals.
3. As Condition 2 (Exercise and weight loss information sent to participants’ homes on a
weekly basis. This information detailed the health benefits of exercise and a balanced diet.
Plus, a weekly exercise and weight loss management class delivered by trained health
professionals), plus an additional weekly phone call to each participant by a health
professional trained in delivering supportive, motivating interventions. In this phone call, the
practitioner also made participants aware that they were free to call back at any point with
questions and/or concerns and/or advice.
To analyse these data, use a two-factor (between-within) ANOVA with repeated measures on one
factor (this is a mixed model design). This will allow you to answer the following three questions:
1. Overall, is there an effect for the condition (referring to whether the type of intervention led
to different levels of weight loss compared to the others)?
2. Overall, is there an effect for time (a within subject variable to account for the 3 data
collection trial periods, and referring to whether there is a change in weight over the three
time-points across all the participants)?
3. Is there an interaction of condition and time (remember, this is the theoretically interesting
bit)?
Having conducted the main analysis, if there is a significant interaction, do think carefully about
how best to proceed with any follow-up analyses.