Investment Model Scale – IMS

My partner fulfills my needs for intimacy (sharing personal thoughts, secrets, etc.)

My partner fulfills my needs for companionship (doing things together, enjoying each other's company, etc.)

My partner fulfills my sexual needs (holding hands, kissing, etc.)

My partner fulfills my needs for security (feeling trusting, comfortable in a stable relationship, etc.)

My partner fulfills my needs for emotional involvement (feeling emotionally attached, feeling good when another feels good, etc.)

I feel satisfied with our relationship.

My relationship is much better than others' relationships.

My relationship is close to ideal.

Our relationship makes me very happy.

Our relationship does a good job of fulfilling my needs for intimacy, companionship, etc.

My needs for intimacy (sharing personal thoughts, secrets, etc.) could be fulfilled in alternative relationships.

My needs for companionship (doing things together, enjoying each other's company, etc.) could be fulfilled in alternative relationships.

My sexual needs (holding hands, kissing, etc.) could be fulfilled in alternative relationships.

My needs for security (feeling trusting, comfortable in a stable relationship, etc.) could be fulfilled in alternative relationships.

My needs for emotional involvement (feeling emotionally attached, feeling good when another feels good, etc.) could be fulfilled in alternative relationships.

The people other than my partner with whom I might become involved are very appealing.

My alternatives to our relationship are close to ideal (dating another, spending time with friends or on my own, etc.).

If I weren't dating my partner, I would do fine-I would find another appealing person to date.

My alternatives are attractive to me (dating another, spending time with friends or on my own, etc.).

My needs for intimacy, companionship, etc., could easily be fulfilled in an alternative relationship.

I have invested a great deal of time in our relationship.

I have told my partner many private things about myself (I disclose secrets to him/her).

My partner and I have an intellectual life together that would be difficult to replace.

My sense of personal identity (who I am) is linked to my partner and our relationship memories.

My partner and I share many memories.

I have put a great deal into our relationship that I would lose if the relationship were to end.

Many aspects of my life have become linked to my partner (recreational activities, etc.), and I would lose all of this if we were to break up.

I feel very involved in our relationship-like I have put a great deal into it.

My relationships with friends and family members would be complicated if my partner and I were to break up (e.g., partner is friends with people I care about).

Compared to other people I know, I have invested a great deal in my relationship with my partner.

I want our relationship to last for a very long time.

I am committed to maintaining my relationship with my partner.

I would not feel very upset if our relationship were to end in the near future.

It is likely that I will date someone other than my partner within the next year.

I feel very attached to our relationship-very strongly linked to my partner.

I want our relationship to last forever.

I am oriented toward the long-term future of my relationship (for example, I imagine being with my partner several years from now).