slides from Andy Field's presentation PDF
Preview slides from Andy Field's presentation
Making Statistics Easy by Getting your PENIS out in the Classroom Professor Andy Field @ ProfAndyField Outline Part 1: ! Why should students love statistics? ! Part 2: ! Why do students hate statistics? ! Part 3: ! Can we make them like statistics more by exposing ! them to my PENIS? @ ProfAndyField Intelligent Laypeople A Scientist (Arguably) @ ProfAndyField Statistics is a life skill Utts (2003) some core skills: ! 1. When causal relationships can and cannot be inferred. 2. The difference between statistical significance and practical importance. 3. The difference between finding ‘no effect' and finding no statistically significant effect. 4. Sources of bias in surveys and experiments, such as poor wording of questions, volunteer response, and socially desirable answers. 5. Understanding that variability is natural, and that ‘normal’ is not the same as ‘average’ (e.g., child development). Gordon (2004) ! 7% of Psychology students think statistics is generally ! useful 16% thought it was useful for psychologyJ ! @ ProfAndyField How the contraceptive pill works @ ProfAndyField The Daily Mail Said... “Women may suffer a permanent decline in sex drive after ! taking the contraceptive pill, researchers have said.” “A number of sexual dysfunction effects are associated with the ! Pill, including dulled libido ... Until now it has always been assumed that these are reversible, and cease to be a problem as soon as a woman comes off the Pill. But new research suggests that the effect on libido might be long lasting or even permanent.” “A team of American researchers ... studied 125 young women ! attending a sexual dysfunction clinic. Sixty two were taking oral contraceptives, 40 had previously taken them, and 23 had never been on the Pill.” “The scientists measured levels of SHBG in the women every ! three months for a year, and found they were seven times higher in users of the Pill than in women who had never taken them.” “Levels declined in women who had stopped taking the Pill, but ! remained three to four times higher than they were in those with no history of using oral contraceptives.” @ ProfAndyField The Layperson Might Think At Best: ! SHBG levels were seven times higher in users of - the Pill than in women who had never taken them (80%) Although levels of SHBG in women who stopped - taking the pill were 3-4 times higher than women who had never taken the pill, this is not a meaningful difference (33% agree) At worst: ! The OC causes permanent loss of Libido (33%) - The OC causes sexual dysfunction (50%) - Women taking the Pill are at risk from - permanent loss of libido even when they stop taking it (83%) GPs should inform women of this risk when - prescribing the pill (100%) @ ProfAndyField Panzer et al. 250 Lower 200 ) B G 150 H S ( o d 100 Baseline i b i >120 Days L 50 Normal 0 Never Taken On Pill Stopped Pill Taking Pill Group Panzer et al. 250 Lower 209 200 ) B G 150 H S ( o Never Taken Pill d 100 i 80 b Stopped Taking Pill i L 42 50 35 Normal 0 Baseline > 120 Days Group The Psychologist Copy Editor ... “Women with sexual dysfunction may suffer a permanent (well, up to 3-6 ! months or a year) decline in levels of SHBG after taking the contraceptive pill, researchers have said.” ! “A number of sexual dysfunction effects are associated with the Pill, including dulled libido ... Until now it has always been assumed that these are reversible and in the current research SHBG did actually decline a lot after coming off of the Pill, and cease to be a problem as soon as a woman comes off the Pill. But new research suggests that the effect on SHBG might be long lasting or even permanent even though we only have data over, on average 3-6 months.” ! “The scientists measured levels of SHBG in the women every three months for a year (well, some of them, the average was 3-6 months), and found they were seven (in a parallel universe where 7 = 5) times higher (at baseline, not after they’d come off the pill) in users of the Pill than in women who had never taken them.” ! “Levels declined in women who had stopped taking the Pill, but remained three to four times higher (in another parallel universe where 3 to 4 means 2.29) than they were in those with no history of using oral contraceptives. However, women in the discontinued group were followed up on average for 73 days less than never users (or 38 days less for the long term follow up group).” Subjective libido was never compared at follow-up in discontinued users and ! never-users, so we don’t really know a lot about libido one way or another. @ ProfAndyField
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