Willy Pedersen

ORCID: 0000-0003-4802-950X
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About
Contact & Profiles
Research Areas
  • Substance Abuse Treatment and Outcomes
  • Homelessness and Social Issues
  • Cannabis and Cannabinoid Research
  • Crime Patterns and Interventions
  • Social and Cultural Dynamics
  • Behavioral Health and Interventions
  • Gender, Feminism, and Media
  • Crime, Deviance, and Social Control
  • Child and Adolescent Psychosocial and Emotional Development
  • Adolescent Sexual and Reproductive Health
  • Sex work and related issues
  • Smoking Behavior and Cessation
  • Community Health and Development
  • Crime, Illicit Activities, and Governance
  • Sexuality, Behavior, and Technology
  • Psychedelics and Drug Studies
  • Prenatal Substance Exposure Effects
  • Education, Healthcare and Sociology Research
  • Gender Roles and Identity Studies
  • Research in Social Sciences
  • COVID-19 and Mental Health
  • Social and Educational Sciences
  • Public Spaces through Art
  • Alcohol Consumption and Health Effects
  • HIV, Drug Use, Sexual Risk

University of Oslo
2016-2025

OsloMet – Oslo Metropolitan University
2015-2025

Statens Serum Institut
2010

Nasjonalforeningen for Folkehelsen
2010

Nasjonalt Kunnskapssenter for Helsetjenesten
2010

Forskning.no (Norway)
2002

Norwegian University of Science and Technology
2001

Norwegian Institute of Public Health
1999

The Research Council of Norway
1996

NORCE Norwegian Research Centre
1993-1995

(i) To describe illegal drug use patterns in an adolescent normal population sample with special emphasis on MDMA, ecstasy; (ii) to investigate where ecstasy is introduced a hypothesized sequence, and (iii) contrast the predictors of those other substances. Special attention was given relationship subcultural music preferences house-party-going.A school-based survey total cohort adolescents enrolled school system city.10,812 adolescents, age 14-17 years, response rate 94.3%.Oslo, capital...

10.1046/j.1360-0443.1999.941116957.x article EN Addiction 1999-11-01

This study investigates the relationship between cannabis use and later depression, suicidal ideation suicide attempts in a cohort of young Norwegians.Data were gathered through Young Norway longitudinal study, which population-based sample 2033 Norwegians followed up over 13-year period, from their early teens to late twenties. Data on: (a) exposure use; (b) attempts. In addition, information about possible confounding factors was included.In adolescence, no associations with depression or...

10.1111/j.1600-0447.2008.01259.x article EN Acta Psychiatrica Scandinavica 2008-09-16

ABSTRACT Aim To examine the association between cannabis use during adolescence and young adulthood, subsequent criminal charges. Methods Data were obtained from Young in Norway Longitudinal Study. A population‐based sample ( n = 1353) was followed 13 to 27 years of age. gathered on use, alcohol consumption problems, other illegal substances such as amphetamines, cocaine opiates. In addition, extensive information socio‐demographic, family personal factors collected. This data set linked...

10.1111/j.1360-0443.2009.02719.x article EN Addiction 2009-10-15

We study the significance of stories about bad trips among users psychedelics. Drawing on narrative theory, we describe characteristics such and explore work they do. In-depth qualitative interviews with 50 Norwegian Almost all participants had frightening experiences when using psychedelics many described these as trips. The key feature a trip was feeling losing oneself or going crazy, ego dissolution. Most said that could be avoided by following certain rules, based tacit knowledge in...

10.1016/j.drugpo.2020.102997 article EN cc-by International Journal of Drug Policy 2020-10-17

BAKGRUNN Covid-19-pandemien våren 2020 innebar skolestengning og strenge sosiale restriksjoner. Studien belyser om dette påvirket ungdoms livstilfredshet subjektive livskvalitet. MATERIALE OG METODE En elektronisk spørreskjemaundersøkelse blant ungdomsskoleelever i Oslo (N = 8 116, 46 % svar) ble gjennomført en periode med stengte skoler tiltak mot smittespredning. Resultatene sammenlignet tilsvarende undersøkelser 2018 13 790, 83 flere fylker før covid-19-restriksjonene 19 799, 49 svar)....

10.4045/tidsskr.20.0437 article NO cc-by-nd Tidsskrift for Den norske legeforening 2020-01-01

Objective: The aim of this study was to investigate the predictors timing alcohol consumption debut and analyze possible associations between later alcohol-related problems. Method: A population sample 465 adolescents (249 girls) from greater Oslo area followed up through five data collections over a 6-year span. By means generalized structural equation modeling--accommodating survival variables--parental friends' influences on age were estimated. Further, consequences subsequent problems...

10.15288/jsa.1998.59.32 article EN Journal of Studies on Alcohol 1998-01-01

Aim. To investigate the relationship between early conduct problems and onset of cannabis use, with special emphasis on possible gender differences. Design. A prospective longitudinal study a national sample 2436 adolescents. The was followed up over year half, when adolescents were in their teens. Setting. Norway. Measurements. On basis an earlier study, (CP) closely related to criteria for disorder (CD) DSM‐III‐R decomposed into three dimensions, labelled serious, aggressive covert....

10.1046/j.1360-0443.2001.9634156.x article EN Addiction 2001-03-01

To investigate prospectively the associations between daily smoking and nicotine dependence anxiety, depression suicide attempts.Data were from Young in Norway Longitudinal Study. A population-based sample (n = 1501) was followed for 13 years ages 13-27 years. Data gathered on patterns dependence; depression, anxiety parasuicide. Extensive information socio-demographic factors, parental family conditions, rearing practices, educational career, conduct problems, alcohol problems use of...

10.1111/j.1360-0443.2008.02395.x article EN Addiction 2008-12-12

To examine the longitudinal stability of mental health and sensation seeking, a sample 553 adolescents aged 16-18 years, was followed over period 20 months. Further, predictive power two constructs with regard to future drug use investigated. The reported relatively low. Accordingly, variable poor predictor use. Sensation however, had high degree stability. In addition, different subdimensions trait were strong predictors use: 'Disinhibition' (DIS) general factor in both sexes. 'Thrill...

10.1111/j.1360-0443.1991.tb01769.x article EN British Journal of Addiction 1991-02-01

Sexual morality is not keeping up with the new sexual practices of young people, even in cultures oriented toward gender equality. The Norwegian high school graduation celebration constitutes an exceptionally liberal context for practices. Many 18-year-old participants this three-week-long engage “hookup” activities, involving kissing, fondling, and intercourse. Through analysis qualitative interviews 25 women 16 men, we argue that while they avoided overt slut-shaming, morally abject...

10.1177/0891243215602107 article EN Gender & Society 2015-09-07

Abstract In a qualitative study, we investigated the medical motives of 100 Norwegian cannabis users, none whom had legal access to cannabis. Cannabis was used therapeutically for conditions such as multiple sclerosis, attention deficit hyperactivity disorder and rheumatism, well quality life sleep, relaxation wellbeing. The borders between recreational use were blurred. This article identifies strategies users gain social acceptance. Several respondents downplayed effects intoxication...

10.1111/j.1467-9566.2012.01476.x article EN Sociology of Health & Illness 2012-07-25

Adolescents increasingly use social media platforms, and these practices open up new forms of sexual victimization, in particular image-based abuse (IBSA). Few studies have examined prevalence rates correlates both physical victimization (PSV) representative samples. We used data from 5,245 adolescent girls (53%) 4,580 boys (47%) the population-based Young Oslo Study (mean age 17.1 years, SD = 0.9). Of all respondents, 2.9% had experienced IBSA, 4.3% PSV, 1.7% IBSA PSV course previous 12...

10.1007/s10508-021-02200-8 article EN cc-by Archives of Sexual Behavior 2022-01-20

The most important predictors of early intercourse debut are reported to be poor social resources and developing problem behaviors. In this study we have a new, additional emphasis on variables related self-concept acceptance. population-based longitudinal study, 1399 Norwegians were followed over 7-year span. We analyzed data using multivariate Cox-regression techniques. Early was part broader spectrum behaviors, including alcohol intoxication early-developing conduct problems. A new...

10.1080/00224490209552199 article EN The Journal of Sex Research 2003-12-01

Objective: To investigate the prevalence of anabolic-androgenic steroid (AAS) use among Norwegian adolescents and to contrast three perspectives on AAS use: performance enhancement in sports competition, body image eating concerns, AAS-use as belonging a cluster problem behaviors. Method: A nationally representative sample 8,877 (53.8% female) youths (15-22 years age) were surveyed (response rate 78%). Sports participation included measures strength sports, competitive training perceived...

10.15288/jsa.2001.62.5 article EN Journal of Studies on Alcohol 2001-01-01

A 12‐item version of the Eating Attitudes Test (EAT‐12) was constructed and applied at 1‐year intervals in a non‐referred cohort 1193 adolescents Norway aged 13–18 years. Eight percent girls scored beyond chosen cut‐off point 9/10 first time 9% second time. Factor analysis demonstrated 3 factors – dieting, bulimia food preoccupation oral control. Both total scores on EAT‐12 different factor showed significant relationship between eating behaviour smoking, level alcohol consumption,...

10.1111/j.1600-0447.1991.tb03164.x article EN Acta Psychiatrica Scandinavica 1991-10-01

It has been suggested in several studies that marriage provides the best framework for a sexual relationship. During past few decades, however, majority of young singles have maintained partnered sex life, and given way to cohabitation as typical heterosexual couples live together adulthood. Taking longitudinal population-based sample Norwegian adults ( n = 2695, age 20-26), we investigated degree which satisfaction was associated with type relationship they were engaged. Among both males...

10.1177/00016993030463001 article EN Acta Sociologica 2003-08-27

10.1016/s0277-9536(02)00015-1 article EN Social Science & Medicine 2003-01-01

Aim: Induced abortion is an experience shared by a large number of women in Norway, but we know little about the likely social or mental health-related implications undergoing induced abortion. International studies suggest increased risk adverse outcomes such as depression, many are weakened poor design. One particular problem lack control for confounding factors to increase both and depression. The aim study was investigate whether factor subsequent Methods: A representative sample from...

10.1177/1403494807088449 article EN Scandinavian Journal of Public Health 2008-06-01

Several studies suggest a rapid decrease of alcohol use among adolescents after the turn century. With decreasing prevalence rates smokers, so-called hardening may have taken place, implying that remaining smokers are characterized by more psychosocial problems. Are similar processes witnessed adolescent users as well?In 1992, 2002 and 2010 we used identical procedures to collect data from three population-based samples 16- 17-year-old Norwegians (n = 9207). We collected on consumption,...

10.1093/alcalc/agu091 article EN Alcohol and Alcoholism 2015-01-03

Little is known about attitudes among ordinary adolescents in favour of the use political violence and radicalization. We draw on a survey from population sample ( n = 8627) Norwegian capital, Oslo. first compared with Muslim, Christian no religious affiliation regard to for purposes support those who go Syria take part active combat. Muslim youth reported higher levels obtain societal change than did other adolescents. The same pattern was revealed fighters Syria. After control variables,...

10.1177/0010836717716721 article EN Cooperation and Conflict 2017-07-04

To investigate the possible linkages between deliveries, abortions and subsequent nicotine dependence, alcohol problems use of cannabis other illegal drugs from ages 15-27 years.Data were gathered as part Young in Norway Longitudinal Study, an 11-year follow-up a representative sample Norwegian adolescents young adults.Information was obtained on (i) history childbirths induced for participants years; (ii) measures drugs; (iii) socio-demographic, family individual confounding factors.Those...

10.1111/j.1360-0443.2007.02040.x article EN Addiction 2007-11-19
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