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SPSS Reliability
Analyze-->Scale--->Reliability Analysis
All the variables in Items
after button statistics and choose all the descriptives
If you find Cronbach's alpha>0,7 you can say that, items are reliable
As it concern validity analysis it depends if you need convergent and/or discriminant validity
Usually convergent validity you need high correlations
discriminant validity is somewhat different. Usually parametric tests such as t-test, ANOVA or non parametric are used

有效度就有信度，你只需做因素分析。或者做校标，相关即可

如何使用spss进行问卷效度和信度分析http://wenku.baidu.com/view/cb7cd8e80975f46527d3e1eb.html