The logic that house wives who said yes the first time in the survey were more likely to say yes the second time being attributed to "foot in the door", seems s

The logic that house wives who said yes the first time in the survey were more likely to say yes the second time being attributed to "foot in the door", seems specious. Instead, folks who are more gullible (or helpful), tend to remain so in other encounters. Without knowing the percentage of folks who agreed to the first survey and those that did not, it's hard to make conclusions that the survey was the cause of folks being helpful in the second.