Table 1. Items and Factor Loadings of the Sibling Influence Scale (N = 166).

	Factor Loadings
Item	Social Learning	Differentiation
My sister/brother provides a model for how I should act.	.83	−.19
My sister/brother tells me how I should behave in a particular situation	.82	−.05
My sister/brother encourages me to get involved in particular activities	.79	−.02
My sister/brother sets an example for how to behave.	.79	−.09
My sister/brother gives me advice on how to behave.	.73	.01
From watching my sister/brother, I have learned how to do things.	.69	−.09
My sister/brother includes me in her/his activities away from home.	.67	.13
My sister/brother includes me in activities with her/his friends	.59	.17
I try to make different choices than my sister/brother.	−.09	.89
I try to be different from my sister/brother	−.05	.83
I want to be different from my sister/brother	−.15	.75
I live my life differently so I won’t be like my sister/brother	−.09	.68
I want people to know that I am not the same as my sister/brother.	−.02	.66
After watching how my sister/brother is turning out, I plan to do things differently.	.21	.51
I’ve learned from my sister’s/brother’s mistakes.	.24	.44
I try to be good at things that my sister/brother isn’t good at.	−.07	.43
It’s hard to live up to my sister’s/brother’s example so I try to be different	.17	.42
My sister/brother sets a bad example for me.	−.25	.40

Note: Factor loadings greater than .40 appear in bold.