study  source                               ni   ai   mi  caregivers
1      "Atienza & Parris Stephens (2000)"  103  .93   20       women
2      "Hooker et al. (2002)"               64  .91   20       mixed
3      "Martire et al. (1997)"             118  .94   20       women
4      "Bass et al. (1996)"                401  .89   20       mixed
5      "Miller et al. (1995)"              215  .90   20       mixed
6      "Hooker et al. (1992)"               51  .89   20       mixed
7      "Hooker et al. (2000)"              175  .86   20       mixed
8      "Brody et al. (1990)"               311  .91   20       mixed
9      "Brody et al. (1995)"               492  .90   20       women
