time lag

  1. D

    Best way to analyze time 1/time 2 data??

    Hi There! I was hoping to get some input on the best way to test some data that I have collected (using SPSS). In short, respondents make an evaluation at time 1, then complete a distractor task, and then complete an evaluation at time 2 (DV is a 1-7 scale). It is a 2x2 between subjects...
  2. E

    Survival analysis - two different end of study times

    Hi I am analysing time to event data using Cox Regression (SPSS) as there are a number of covariates to be included. Previously, the end of the study was 2009. Recently, some participants who were recorded as not having had the event by 2009, were found to have had the event by the end...
  3. M

    interpreting a correlation plot (time series)

    Hi, I've been asked to suggest a time series model based on the following correlation function, I was just wondering what you would suggest, ACF Yt 0.97 0.97 0.91 0.80 0.79 delta Yt -0.42 0.18 -0.02 0.07 -0.1 I can tell straight away that the time series Yt is non...
  4. D

    Determining best analysis method for health knowledge research

    Hi, I have data from a dozen countries capturing knowledge on health-related issues. The same survey, translated appropriately, was used in all countries. After the initial survey, a training was executed in each country, teaching people about the issues addressed in the survey. Now...