Briefer assessment of social network drinking: A test of the Important People Instrument-5 (IP-5).
The Important People instrument (IP; Longabaugh et al., 2010) is one of the most commonly used measures of social network drinking. Although its reliability and validity are well-supported, the length of the instrument may limit its use in many settings. The present study evaluated whether a briefer, 5-person version of the IP (IP-5) adequately reproduces scores from the full IP. College freshmen (N = 1,053) reported their own past-month drinking, alcohol-related consequences, and information about drinking in their close social networks at baseline and 1 year later. From this we derived network members' drinking frequency, percentage of drinkers, and percentage of heavy drinkers, assessed for up to 10 (full IP) or 5 (IP-5) network members. We first modeled the expected concordance between full-IP scores and scores from simulated shorter IP instruments by sampling smaller subsets of network members from full IP data. Then, using quasi-experimental methods, we administered the full IP and IP-5 and compared the 2 instruments' score distributions and concurrent and year-lagged associations with participants' alcohol consumption and consequences. Most of the full-IP variance was reproduced from simulated shorter versions of the IP (ICCs ≥ 0.80). The full IP and IP-5 yielded similar score distributions, concurrent associations with drinking (r = 0.22 to 0.52), and year-lagged associations with drinking. The IP-5 retains most of the information about social network drinking from the full IP. The shorter instrument may be useful in clinical and research settings that require frequent measure administration, yielding greater temporal resolution for monitoring social network drinking. (PsycINFO Database Record
Department of Psychiatry and Behavioral Sciences.
Kevin A
KA
Hallgren
Center for Alcohol and Addiction Studies, Brown University.
Nancy P
NP
Barnett
D000328:Adult; D000067292:Alcohol Drinking in College / Q000523:psychology*; D000435:Alcoholic Intoxication / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012919:Social Behavior; D012944:Social Support; D014495:Universities; D055815:Young Adult
Addict Behav. 1979;4(1):55-60
420046
J Stud Alcohol Drugs. 2012 Jan;73(1):89-98
22152666
Psychol Assess. 2000 Mar;12(1):102-11
10752369
Pers Soc Psychol Bull. 2006 Jun;32(6):820-32
16648206
Addict Behav. 2007 Oct;32(10):2211-25
17428616
BMC Pediatr. 2012 Aug 06;12:115
22867027
Behav Med. 2015;41(3):90-7
26332926
J Pers Soc Psychol. 2002 Jan;82(1):102-11
11811628
Psychol Addict Behav. 2013 Sep;27(3):819-25
23586450
Addiction. 2009 Aug;104(8):1281-90
19549057
Psychol Addict Behav. 2004 Jun;18(2):113-21
15238053
J Subst Abuse Treat. 2009 Apr;36(3):321-30
18835677
J Adolesc Health. 2014 May;54(5):508-14
24012065
Alcohol Clin Exp Res. 2011 Mar;35(3):454-63
21158876
J Stud Alcohol Drugs. 2015 Mar;76(2):247-55
25785800
J Consult Clin Psychol. 2009 Apr;77(2):229-42
19309183
Addiction. 1998 Sep;93(9):1313-33
9926538
J Stud Alcohol Drugs. 2010 Nov;71(6):837-46
20946740
J Stud Alcohol Drugs. 2010 Nov;71(6):930-7
20946752
Am J Drug Alcohol Abuse. 2011 Jul;37(4):259-63
21702726
J Alcohol Drug Depend. 2015 Oct;3(5):null
26692436
J Stud Alcohol. 2002 Jan;63(1):114-21
11925053
Alcohol Alcohol. 2007 Jul-Aug;42(4):347-53
17510103
J Am Coll Health. 1992 Sep;41(2):49-58
1460173
Drug Alcohol Depend. 2013 Sep 1;132(1-2):309-15
23523132
J Psychoactive Drugs. 2014 Apr-Jun;46(2):93-105
25052785
Addict Behav. 2001 Mar-Apr;26(2):181-99
11316376
J Stud Alcohol Drugs. 2012 Jan;73(1):99-110
22152667
J Stud Alcohol. 1993 Jul;54(4):465-78
8341050
Psychol Addict Behav. 2013 Dec;27(4):921-33
23438241
Addict Disord Their Treat. 2014 Dec 1;13(4):179-189
25598744