I was looking for something on work because I’ve done a lot with vocational rehab and work and I think it is something that is really important for people’s lives and success and I found one, fairly recent. They have taken a longitudinal study that started in the 1960’s went on in the 1970’s. It began in the 1980’s and started with 3101 men which dropped in the mid 1990’s to 334 that they were actually able to find and have agree to come in. They interviewed and tested them on multiple occasions over the years so they did have some good data. And looking at that data across those years it showed a positive effect of more challenging work on intellect, especially for the older workers – the oldest in their population. Again, you could argue it either way as they did. You could say staying involved in work, you know using it, promotes keeping cognition as you age. Alternately, the fact that these people were engaged for years and able to do that, it just makes sense that they were repeatedly functioning at a higher level as they age.