Self-efficacy as a relevant construct in understanding sexual response and dysfunction
Abstract
While self-efficacy has been widely used to explain and treat various biobehavioral responses, few investigations have examined this concept in the context of sexual response and dysfunction. In this study, the authors constructed a measure of sexual self-efficacy, investigated whether it differentiated men with and without sexual dysfunction, and determined the utility of this construct by exploring its relation to other variables known to be related to erectile dysfunction in a sample of 60 men with erectile dysfunction and 14 functional men visiting a urology clinic. The sexual self-efficacy index differentiated men with and without erectile dysfunction, and general linear modeling showed that the index did indeed relate to other variables known to affect sexual and emotional response during a partnered sexual experience. These findings suggest that, as a unifying construct that predicts cognitive, affective, motivational, and behavioral responses, sexual self-efficacy has the potential to play an important role in the assessment of effective treatments for sexual problems.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Men with ED tend to attribute the erectile failure to their own incompetence (internal attribution) and experience a lower sense of control or self-efficacy.
“Men with ED tend to attribute the erectile failure to their own incompetence (internal attribution) and experience a lower sense of control or self-efficacy.20,30,31”
From A Psychosocial Approach to Erectile Dysfunction: Position Statements from the European Society of Sexual Medicine (ESSM) (2021) · cites this paper as [30]
Cites
Diagnostic and Statistical Manual of Mental Disorders
Williams, J. B. W., & First, M. B. (2013) · Oxford University Press eBooks · doi:10.1093/acrefore/9780199975839.013.104 · Cited by 109,842 · see citing works
Self-efficacy mechanism in human agency
Bandura, A. (1982) · American Psychologist · doi:10.1037/0003-066x.37.2.122 · Cited by 15,975 · see citing works
Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR)
American Psychiatric Association (2000) · doi:10.1176/appi.books.9780890423349 · Cited by 11,069 · see citing works
Regulation of cognitive processes through perceived self-efficacy.
Bandura, A. (1989) · Developmental Psychology · doi:10.1037/0012-1649.25.5.729 · Cited by 1,900 · cited 2× · see citing works
“Individuals having high levels of self-efficacy rehearse situations with positive performance strategies and visualize success even when having to overcome significant problems whereas those with low self-efficacy dwell on the negatives of the situation and envision failed scenarios (Bandura, 1989).”
BackgroundThe Alcohol Abstinence Self-Efficacy scale.
DiClemente, C. C., Carbonari, J. P., Montgomery, R. P. G., & Hughes, S. O. (1994) · Journal of Studies on Alcohol · doi:10.15288/jsa.1994.55.141 · Cited by 555 · see citing works
Disorders of Orgasm and Ejaculation in Men
Rowland, D. L., McMahon, C. G., Abdo, C. H. N., Chen, J., Jannini, E. A., Waldinger, M. D., & Ahn, T. Y. (2010) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2010.01782.x · Cited by 507 · see citing works
McMahon, C. G., Althof, S. E., Waldinger, M. D., Porst, H., Dean, J. P., Sharlip, I. D., Adaikan, P. G., Becher, E. F., Broderick, G. A., Buvat, J., et al. (2008) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2008.00901.x · Cited by 486 · see citing works
Hoeppner, B. B., Kelly, J. F., Urbanoski, K. A., & Slaymaker, V. J. (2011) · Journal of Substance Abuse Treatment · doi:10.1016/j.jsat.2011.04.005 · Cited by 455 · see citing works
Nobre, P. J., & Pinto‐Gouveia, J. (2007) · Archives of Sexual Behavior · doi:10.1007/s10508-007-9258-0 · Cited by 136 · see citing works
Schnoll, R. A., Martinez, E., Tatum, K. L., Glass, M., Bernath, A. M., Ferris, D. G., & Reynolds, P. (2010) · Addictive Behaviors · doi:10.1016/j.addbeh.2010.08.024 · Cited by 109 · see citing works
Latini, D. M., Penson, D. F., Colwell, H. H., Lubeck, D. P., Mehta, S. S., Henning, J. M., & Lue, T. F. (2002) · The Journal of Urology · doi:10.1016/s0022-5347(05)64302-9 · Cited by 108 · see citing works
Swindle, R. W., Cameron, A. E., Lockhart, D. C., & Rosen, R. C. (2003) · Archives of Sexual Behavior · doi:10.1023/b:aseb.0000007459.48511.31 · Cited by 96 · see citing works
Latini, D. M., Penson, D. F., Wallace, K. L., Lubeck, D. P., & Lue, T. F. (2006) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2006.00331.x · Cited by 91 · see citing works
Attention, arousal and expectancies in anxiety and sexual disorders
van den Hout, M., & Barlow, D. H. (2000) · Journal of Affective Disorders · doi:10.1016/s0165-0327(00)00341-4 · Cited by 70 · see citing works
Shabsigh, R., & Rowland, D. L. (2007) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2007.00557.x · Cited by 67 · see citing works
Annesi, J. J., & Gorjala, S. (2010) · BioPsychoSocial Medicine · doi:10.1186/1751-0759-4-10 · Cited by 66 · see citing works
The SSES-E: A Measure of Sexual Self-Efficacy in Erectile Functioning
Libman, E., Rothenberg, I., Fichten, C. S., & Amsel, R. (1985) · Journal of Sex & Marital Therapy · doi:10.1080/00926238508405450 · Cited by 60 · see citing works
Bach, A. K., Brown, T. A., & Barlow, D. H. (1999) · Behavior Therapy · doi:10.1016/s0005-7894(99)80047-1 · Cited by 58 · see citing works
Althof, S. E., & Rowland, D. L. (2008) · British Journal of Urology · doi:10.1111/j.1464-410x.2008.07790.x · Cited by 32 · see citing works
Cognitions and sexual expression in the aging
Creti, L., & Libman, E. (1989) · Journal of Sex & Marital Therapy · doi:10.1080/00926238908403814 · Cited by 26 · see citing works
Latini, D. M., Penson, D. F., Wallace, K. L., Lubeck, D. P., & Lue, T. F. (2006) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2006.00332.x · Cited by 23 · see citing works
Rowland, D. L., Myers, A. L., Adamski, B. A., & Burnett, A. L. (2013) · BJU International · doi:10.1111/j.1464-410x.2012.11347.x · Cited by 21 · see citing works
Rowland, D. L., Georgoff, V. L., & Burnett, A. L. “. (2010) · The Journal of Sexual Medicine · doi:10.1111/j.1743-6109.2010.01904.x · Cited by 21 · see citing works
Holden, R. R. (1999) · Psychological Reports · doi:10.2466/pr0.1999.84.1.255 · Cited by 7 · see citing works
Rowland, D. L., Lechner, K. H., & Burnett, A. L. “. (2012) · Journal of Sex & Marital Therapy · doi:10.1080/0092623x.2011.569640 · Cited by 5 · see citing works
Flagged first, then by citations
1 of the 26 references couldn’t be matched to a known paper.
Cited by
Sorted by citations
Dewitte, M., Bettocchi, C., Carvalho, J., Corona, G., Flink, I., Limoncin, E., Pascoal, P., Reisman, Y., & Van Lankveld, J. (2021) · Sexual Medicine · doi:10.1016/j.esxm.2021.100434 · Cited by 97 · see citing works
“20,30,31 Furthermore, self-blame and negative affect are higher when men attribute their ED to psychological or relational causes as opposed to organic causes.”
BackgroundAnxiety and Performance in Sex, Sport, and Stage: Identifying Common Ground
Rowland, D. L., & van Lankveld, J. J. D. M. (2019) · Frontiers in Psychology · doi:10.3389/fpsyg.2019.01615 · Cited by 81 · see citing works
The Burden of Sexual Problems: Perceived Effects on Men’s and Women’s Sexual Partners
Rowland, D. L., & Kolba, T. N. (2017) · The Journal of Sex Research · doi:10.1080/00224499.2017.1332153 · Cited by 46 · see citing works
Khan, S., Amjad, A., & Rowland, D. L. (2019) · The Journal of Sexual Medicine · doi:10.1016/j.jsxm.2018.12.014 · Cited by 43 · see citing works
Sexual Self-Efficacy and Associated Factors: A Review
Assarzadeh, R., Khalesi, Z. B., & Jafarzadeh-Kenarsari, F. (2019) · Shiraz E-Medical Journal · doi:10.5812/semj.87537 · Cited by 42 · see citing works
“Adolescents had higher sexual self-esteem uniquely predicted higher SSE scores (19, 41).”
BackgroundRowland, D. L., & Kolba, T. N. (2015) · The Journal of Sexual Medicine · doi:10.1111/jsm.12881 · Cited by 32 · see citing works
Horvath, Z., Smith, B. H., Sal, D., Hevesi, K., & Rowland, D. L. (2020) · Sexual Medicine · doi:10.1016/j.esxm.2020.06.008 · Cited by 27 · see citing works
“From a psychological perspective, women who struggle to reach orgasm under any circumstances may tend to internalize the problem, feel greater distress, and experience diminished feelings of overall sexual self-efficacy.(7,8,13)Duringmasturbation (even with no “evaluating observer” physically present), as women focus…”
BackgroundSelf-citationSexual Function and Mood Disorders Among Menopausal Women: A Systematic Scoping Review
Rahmani, A., Afsharnia, E., Fedotova, J., Shahbazi, S., Fallahi, A., Allahqoli, L., Gheshlagh, R. G., Abboud, S., & Alkatout, İ. (2022) · The Journal of Sexual Medicine · doi:10.1016/j.jsxm.2022.03.614 · Cited by 29 · see citing works
Cognitive behavioral therapy as an adjunct treatment for Pakistani men with ED
Khan, S., Amjad, A., & Rowland, D. L. (2017) · International Journal of Impotence Research · doi:10.1038/ijir.2017.23 · Cited by 24 · see citing works
Moving Toward Empirically Based Standardization in the Diagnosis of Delayed Ejaculation
Rowland, D. L., & Côté-Léger, P. (2020) · The Journal of Sexual Medicine · doi:10.1016/j.jsxm.2020.07.017 · Cited by 21 · see citing works
A Conceptual Approach to Understanding and Managing Men’s Orgasmic Difficulties
Rowland, D. L. (2021) · Urologic Clinics of North America · doi:10.1016/j.ucl.2021.06.012 · Cited by 20 · see citing works
Attribution Patterns in Women With and Without Orgasmic Difficulties
Rowland, D. L., Medina, M., & Dabbs, C. R. (2017) · The Journal of Sex Research · doi:10.1080/00224499.2017.1400514 · Cited by 18 · see citing works
“…having the potential to exacerbate the dysfunctional response by reducing the individual’s overall sense of self-efficacy (Alloy et al., 2006; Aubin & Heiman, 2004; Rowland et al., 2015), thereby placing further stress on the relationship (Nobre& Pinto-Gouveia, 2009; Stephenson & Meston, 2016).”
BackgroundTypologies of Women with Orgasmic Difficulty and Their Relationship to Sexual Distress
Hevesi, K., Miklós, E., Horváth, Z., Sal, D., & Rowland, D. L. (2020) · The Journal of Sexual Medicine · doi:10.1016/j.jsxm.2020.02.008 · Cited by 14 · see citing works
Rowland, D. L., Dabbs, C. R., & Medina, M. (2018) · Archives of Sexual Behavior · doi:10.1007/s10508-018-1270-z · Cited by 14 · see citing works
Prevalence of Premature Ejaculation: A Narrative Review of National and Cultural Differences
Tamas, S., Mirnics, Z., Hevesi, K., & Rowland, D. L. (2024) · Sexes · doi:10.3390/sexes5040043 · Cited by 13 · see citing works
“Furthermore, both meth-ods (using professional definitions or validated PROs) typically assess both ejaculatory control—the primary defining criteria for PE [9,12,14,87]—and bother/distress [78].”
Rowland, D. L., & Kirana, P. (2025) · Sexual Medicine Reviews · doi:10.1093/sxmrev/qeaf012 · Cited by 12 · see citing works
Treating Men's Orgasmic Difficulties
Rowland, D. L., & Cooper, S. E. (2017) · doi:10.1002/9781118510384.ch6 · Cited by 12 · see citing works
Banaei, M., Hosseini, S., Alizadeh, S., Roozbeh, N., Jahanshahloo, B., Ghasemi, E., & Ghasemi, V. (2025) · PLoS ONE · doi:10.1371/journal.pone.0318002 · Cited by 13 · see citing works
Attribution patterns in men with sexual problems: Analysis and implications for treatment
Rowland, D. L., Kostelyk, K. A., & Tempel, A. R. (2016) · Sexual and Relationship Therapy · doi:10.1080/14681994.2015.1126669 · Cited by 10 · see citing works
“Such general cognitive frameworks are highly counterproductive, having the potential to exacerbate the dysfunctional response by reducing the man’s sense of self-efficacy (Rowland et al., 2015), thereby placing further stress on the relationship and possibly interfering with effective treatment strategies (Nobre & Pin…”
BackgroundMethodResultInfluentialBorgmann, M., Brandner, L. M., Durso, D. D., Gonin-Spahni, S., Znoj, H., & Werner, M. A. (2023) · The Journal of Sex Research · doi:10.1080/00224499.2023.2261439 · Cited by 11 · see citing works
“…Self-Efficacy & Pleasure-Related Mastery and Enjoyment-Related Self-Worth & Pleasure-Related Validation scales showed differential patterns of relationships with Sexual Assertiveness and Self-Esteem, supporting their intended interpretation (Mastro & Zimmer-Gembeck, 2015; Rowland et al., 2015).”
Attribution Patterns in Men Who Ejaculate Before They Desire: An Internet Survey
Rowland, D. L., Mikolajczyk, L. C., Pinkston, D. M., Reed, H. M., & Lo, D. M. (2015) · Journal of Sex & Marital Therapy · doi:10.1080/0092623x.2015.1069432 · Cited by 10 · see citing works
“…frameworks, while consisting of both accurate and false assumptions, may exacerbate the dysfunctional response by reducing the man’s sense of self-efficacy (Rowland et al., 2015), place stress on the relationship, and interfere with effective treatment strategies (Nobre & Pinto-Gouveia, 2009).”
BackgroundPredicting Anxiety and Depression Among Erectile Dysfunction Patients: A Cross-Sectional Study
Nguyen, Q., Trường, L. V., Chung, E., Quang, B. V., Long, L. Q., Ngọc, N. T., Minh, N. A., Anh, D. M., Thành, N. Đ., & Nam, N. T. (2024) · American Journal of Men s Health · doi:10.1177/15579883231223502 · Cited by 9 · see citing works
“Men with ED often attribute the erectile failures to personal incompetence (internal attri-bution) and perceive a lower sense of control or self-efficacy (Rowland et al., 2015).”
BackgroundKhazaeian, S., Navidian, A., & Rahimi-Nezhad, M. (2023) · Sexual Medicine · doi:10.1093/sexmed/qfad031 · Cited by 8 · see citing works
Zadeh, Z. F., Bhutto, Z. H., McNabney, S. M., Kneusel, J. A., & Rowland, D. L. (2021) · International Journal of Sexual Health · doi:10.1080/19317611.2020.1864559 · Cited by 8 · see citing works
Kirana, P.-S., van Lankveld, J. J. D. M., Dewitte, M. D., & Rowland, D. L. (2025) · Sexual Medicine · doi:10.1093/sexmed/qfaf097 · Cited by 7 · see citing works
“37,38 Other dispositional factors linked to sexual performance anxiety include socially and culturally derived sexual beliefs/myths (eg, macho beliefs, submission beliefs); maladaptive sexual schemas (eg, “I’m helpless” or “I’m not good at this”); and negative automatic thoughts (or self-talk)…”
Nuraini, Afiyanti, Y., & Setyowati, S. (2019) · Enfermería Clínica · doi:10.1016/j.enfcli.2019.04.085 · Cited by 6 · see citing works
“According to Rowland (2015), positive sexual self-concept, including sexual self-efficacy, is strongly associated with sexual function.29,30,9 Menopausal women in our study tend to not refuse their husband’s request for sexual intercourse.”
BackgroundPromoting sexual self-efficacy of men with spinal cord injury using PLISSIT model
Abed, M., Raeisi, Z., Rezaei‐Jamalouei, H., & Shahidi, M. A. (2020) · Psychology and Sexuality · doi:10.1080/19419899.2020.1789893 · Cited by 5 · see citing works
“…and high levels of learned helplessness could predict depression in individuals with SCI. Similarly, sexual self-efficacy is crucial for proper and desirable sexual functioning (Willoughby et al., 2014) which, in turn, is related to a better mental and social performance (Sadock & Kaplan, 2009).”
BackgroundKong, L. V., Goh, P. H., & Ting, R. S. (2022) · Psychology and Sexuality · doi:10.1080/19419899.2022.2053564 · Cited by 5 · see citing works
“While the idea of the role of self-liking in sexual functioning has not been widely studied, self-efficacy being a closely related concept to self-competence (Tafarodi & Swann, 2001) has been found to be positively associated with sexual function (Atrian et al., 2019; Rowland et al., 2015).”
BackgroundResultBhutto, Z. H., Zadeh, Z. F., Shahab, A., & Rowland, D. L. (2020) · Women & Health · doi:10.1080/03630242.2020.1824955 · Cited by 5 · see citing works
Banbury, S. A., Moneta, G. B., & Chandler, C. (2021) · Sexual & Relationship Therapy · doi:10.1080/14681994.2021.1932796 · Cited by 4 · see citing works
“For example, regarding self-efficacy and anxiety, those who do not feel they can manage anxiety provoking events/triggers might result in heightened anxiety arousal (Bandura, 2007) which can impact sexual functioning (Rowland et al, 2015).”
BackgroundRowland, D. L., McNabney, S. M., Attinger, D. R., Harrold, K. J., Kövi, Z., & Hevesi, K. (2023) · International Journal of Impotence Research · doi:10.1038/s41443-023-00752-y · Cited by 4 · see citing works
Rowland, D. L., Mirnics, Z., & Kirana, P. (2025) · Current Sexual Health Reports · doi:10.1007/s11930-025-00412-w · Cited by 3 · see citing works
“…findings based on this limited sample of HPCs adequately represent the larger population of HPCs treating men with PE, we do believe they offer a preliminary window into the kinds of issues that come into play in their acceptance of clients and prioritizing treatment objectives [e.g., 212 , 213 ].”
An Integrative Approach to the Treatment of Premature Ejaculation
Rowland, D. L., Tuohy, A., & Humpfer, J. (2014) · Current Sexual Health Reports · doi:10.1007/s11930-014-0015-9 · Cited by 3 · see citing works
Rowland, D. L., Kneusel, J. A., Bacys, K. R., Hamilton, B. D., Bhutto, Z. H., & Zadeh, Z. F. (2021) · Journal of Sex & Marital Therapy · doi:10.1080/0092623x.2021.1881671 · Cited by 2 · see citing works
“…(i.e., take responsibility for it) than US women, a process that has the potential to diminish sense of self-efficacy, heighten the expectation for failure, and lead to a self-fulfilling prophecy that sustains or exacerbates the problem (Bandura, 1989; Frank & Maass, 1985; Rowland et al., 2015).”
BackgroundRowland, D. L. (2020) · Springer eBooks · doi:10.1007/978-3-319-59531-3_49-1 · Cited by 2 · see citing works
Makhmudov, A., Tulaboev, A., Rowland, D. L., Aliev, S., & Rikhsiboev, J. (2026) · Sexual Medicine · doi:10.1093/sexmed/qfag039 · Cited by 1 · see citing works
“…as an occasion for shame, embarrassment , and distress rather than an opportunity for pleasure, positive feelings, and intimac y. 9 , 10 , 23 , 24 The psychological burden of PE: Sexual and relationship satisfaction in partners of men with PE Studies have indicated that the man’s PE response…”
Husband’s and Health Workers Support Increase Self-acceptance After Hysterectomy
Afiyah, R. K., Hasina, S. N., Sari, R. Y., Umamah, F., Rusdianingseh, R., Rohmawati, R., Wahyuni, C. U., Prasetyo, B., & Qomaruddin, M. B. (2022) · Open Access Macedonian Journal of Medical Sciences · doi:10.3889/oamjms.2022.9083 · Cited by 1 · see citing works
“Self-acceptance in post-operative patients can be increased with knowledge and knowledge will be obtained well when a person has higher education [18].”
BackgroundInfluentialCross Cultural Research: Opportunities and Strategies for Discovery
Rowland, D. L., & Motofei, I. G. (2020) · Trends in andrology and sexual medicine · doi:10.1007/978-3-030-36222-5_19 · Cited by 1 · see citing works
Rokach, A., & Patel, K. (2021) · Elsevier eBooks · doi:10.1016/b978-0-12-819174-3.00009-7 · Cited by 1 · see citing works
The Relationship between Erectile Dysfunction, Sexual Self Efficacy and the Dark Triad
Banbury, S. A., Moneta, G. B., Chandler, C., & Hutchison, P. (2022) · International Journal of Scientific Research in Science and Technology · doi:10.32628/ijsrst229668 · Cited by 1 · see citing works
Afiyah, R. K., Umamah, F., Handayani, N., Rusdianingseh, & Prasetyo, B. (2023) · Bali Medical Journal · doi:10.15562/bmj.v12i2.4325 · Cited by 1 · see citing works
Thevalidation and correlations with empowering leadership and self-efficacy scales
ASLAN, A. P. D. S., & DemetAkarcayUlutas, I. (2015) · JOURNAL OF SOCIAL SCIENCE RESEARCH · doi:10.24297/jssr.v8i3.4089 · Cited by 1 · see citing works
PELVIC FLOOR MUSCLE EXERCISE IMPROVING SEXUAL SELF-EFFICACY
Lolowang, N. L., Afiyanti, Y., & Ungsianik, T. (2019) · Journal of Maternity Care and Reproductive Health · doi:10.36780/jmcrh.v2i1.73
“PFM exercise could improve sexual self-efficacy as a construct that JMCRH: Vol. 2 Issue 1 112 problems in women (Rowland et al., 2015).”
Background
- Authors
- Rowland, D. L., Adamski, B. A., Neal, C. J., Myers, A. L., & Burnett, A. L.
- Affiliations
- Valparaiso University (US)
- Johns Hopkins University (US)
- Corresponding author
- Rowland, David L.
- Venue
- Journal of Sex & Marital Therapy
- Publisher
- Informa UK Limited
- Published
- 2013-12-13
- Volume
- 41
- Issue
- 1
- Pages
- 60-71
- ISSN
- 0092-623X (ISSN-L)
- 1521-0715
- OpenAlex
- W1990697026
- Cited by
- 44
- References
- 26
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 6 · 2020: 7 · 2019: 5 · 2018: 1 · 2017: 4 · 2015: 5 · 2014: 1
- FWCI
- 1.42
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Sex & Marital Therapy (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Sexual function and dysfunction studies
- Social Sciences › Psychology › Clinical Psychology › Sexuality, Behavior, and Technology
- Health Sciences › Medicine › Urology › Urological Disorders and Treatments
- Keywords
- sexual self-efficacy, sexual dysfunction, erectile dysfunction, sexual response, male sexual health, sexual motivation, sexual behavior
- MeSH terms
- Adult, Aged, Humans, Erectile Dysfunction, Male, Middle Aged, Psychometrics, Surveys and Questionnaires, Statistics as Topic, Reproducibility of Results, Linear Models, Sexual Dysfunctions, Psychological, Self Efficacy, Health Literacy
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review