Table 1

Items included in each social cognitive theory construct

SCT constructs	Items	Responses
		Strongly disagree		Strongly agree
		0	1	2	3	4
1. Self-efficacy (most recent partner)	Can use a condom even if most recent sex partner does not want to	0	1	2	3	4
	Can use a condom every time you have sex with most recent sex partner	0	1	2	3	4
	Can use a condom even if want to feel close with most recent sex partner	0	1	2	3	4
	Can use condom even if you are making up with most recent sex partner after a fight	0	1	2	3	4
	Can use condom even high or drunk with most recent sex partner	0	1	2	3	4
2. Self-control self-efficacy	I could stop having sex: To get a condom even if I'm really turned on	0	1	2	3	4
	If no condom was available	0	1	2	3	4
	Even if it meant getting dressed and going to the store	0	1	2	3	4
	Even with a really hot new partner	0	1	2	3	4
	Even with someone I want to have a relationship with	0	1	2	3	4
	Even with someone I am in love with	0	1	2	3	4
3. Sexual self-efficacy	I am sure that I can: Talk with partner about sexual past and our risk of getting STDs and AIDS from each other	0	1	2	3	4
	Go without sex until partner has had check up for STDs and doesn't have any	0	1	2	3	4
	break up with a partner who puts me at risk of getting STDs	0	1	2	3	4
	Avoid having sex when I am drunk, or high on drugs	0	1	2	3	4
	Get to know potential partners better before having sex with them	0	1	2	3	4
	Have fewer sex partners in the next 3 months, than in the past 3 months	0	1	2	3	4
	Have sex with only one partner in the next 3 months	0	1	2	3	4
	Go without having sex for the next 3 months	0	1	2	3	4
	Discuss using condoms with my partners	0	1	2	3	4
	Keep condoms where I will have them nearby when I need them	0	1	2	3	4
	Use condoms more often	0	1	2	3	4
	Use condoms until my partner has had a check-up for STDs, and doesn’t have any	0	1	2	3	4
	Use condoms until my partner has been tested for HIV (AIDS), and is HIV negative	0	1	2	3	4
	Use a condom with my MAIN partner EVERY TIME we have vaginal or anal sex	0	1	2	3	4
	Use a condom with partners OTHER THAN my main partner, EVERY TIME we have vaginal or anal sex	0	1	2	3	4
4. Hedonistic outcomes	Condoms ruin the mood	0	1	2	3	4
	Sex doesn’t feel as good when you use a condom	0	1	2	3	4
	Sex with condoms doesn’t feel natural	0	1	2	3	4
	Using condoms breaks up the rhythm of sex	0	1	2	3	4
5. Partner expect outcomes (most recent partner)	I think my most recent sex partner would: Be proud of me if I asked to use condoms	0	1	2	3	4
	Be supportive if I asked to use condoms	0	1	2	3	4
	Appreciate it if I asked to use condoms	0	1	2	3	4
	Be mad at me if I asked to use condoms	0	1	2	3	4
	Break up with me if I asked to use condoms	0	1	2	3	4
	Think I have other partners if I asked to use condoms	0	1	2	3	4
	Be jealous if I asked to use condoms	0	1	2	3	4
6. Risk perception	If I don’t use condoms, I could get infected with an STD or HIV in the next 3 months	0	1	2	3	4
	Unless I change my behaviour, I am likely to get an STD or HIV	0	1	2	3	4
	If I don’t reduce the number of people I have unprotected sex with, I could get infected with a STD or HIV	0	1	2	3	4
	If I keep having unprotected sex with my partner(s), I could get infected with a STD or HIV	0	1	2	3	4
	Sometimes I think that it’s only a matter of time before I get an STD or HIV	0	1	2	3	4

SCT, social cognitive theory; STD, sexually transmitted disease.