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KELSEY GROSSMAN LAURA JIMENEZ COUSINS, A. J., FUGERE, M. A., & FRANKLIN M. (2009), DIGIT RATIO (2D:4D), MATE GUARDING, AND PHYSICAL AGGRESSION IN DATING.

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Presentation on theme: "KELSEY GROSSMAN LAURA JIMENEZ COUSINS, A. J., FUGERE, M. A., & FRANKLIN M. (2009), DIGIT RATIO (2D:4D), MATE GUARDING, AND PHYSICAL AGGRESSION IN DATING."— Presentation transcript:

1 KELSEY GROSSMAN LAURA JIMENEZ COUSINS, A. J., FUGERE, M. A., & FRANKLIN M. (2009), DIGIT RATIO (2D:4D), MATE GUARDING, AND PHYSICAL AGGRESSION IN DATING COUPLES. PERSONALITY AND INDIVIDUAL DIFFERENCES, 46, 7, Digit ratio (2D:4D), mate guarding, and physical aggression in dating couples

2 Introduction Mate guarding: a way for a male to assure that partner remains faithful and doesn’t succumb to infidelity  Makes sure male doesn’t spend energy raising a child that isn’t his own  Consists of monopolizing one’s mate and discouraging potential threats from making a move on his mate 2D:4D: digital ratio which indicates the levels of testosterone in the body  Higher levels of testosterone in utero are associated with lower digit ratio and with aggressive behavior  Is an unusual trait because it doesn’t change as much across the lifespan as do secondary sex traits  Aggressive behaviors are often associated with mate guarding Studies that show a relationship between aggression and 2D:4D indicate that low 2D:4D women show more reactive aggression (anger in response to frustration and being provoked) and indirect aggression (sneaky, manipulative aggression, for example; spreading a rumor)

3 Hypothesis Men with lower 2D:4D will:  1. Mate guard more than higher 2D:4D men  2. Make more intrasexual threats than men with higher 2D:4D  3. Be more physically aggressive toward male competitors than men with higher 2D:4D  4. Be more physically aggressive toward their partner than higher 2D:4D men  5. Be more physically aggressive when their partner cheated Also,  6. Women will resist mate guarding more when they cheated  7. Women will resist mate guarding more when their partner has a higher 2D:4D, due to lower costs to her  8. Women’s 2D:4D will not be associated with any of the behaviors described above

4 Methods Participants  101 heterosexual dating couples  At least one member of the pair was enrolled in an Introductory Psych class  Mean relationship length was 18 months  SD =  Mean female age was 20  SD = 3.09  Mean male age was 21  SD = 3.85  Women demographics  55% white  34% Hispanic  3% Asian  7% other  Men demographics  56% white  36% Hispanic  2% Asian  4% other

5 Materials and Procedure First all participants had their 2D:4D levels evaluated by measuring each side of the index finger and the ring finger on the right hand of each participant twice.  Measurements were averaged in order to create the ratio; index finger (2D) to ring finger (4D) Then a 42 item male guarding scale with seven subscales was administered  Asked to rate whether each behavior listed had occurred during the past 6 months  From 0 (never) to 4 (very often)  Subscales included:  Vigilance  Protection  Monopolization  Possessiveness  Intrasexual threats  Intrasexual physical aggression  Threats and aggression toward partner Also administered a scale which measured resistance behaviors  27 items; questions included, “I hid stuff from my girlfriend so she wouldn’t find it”  Each individual rated their resistance to specific behaviors during past 6 months on a 0 to 4 scale  Higher scores indicate more resistance to mate guarding Lastly, each participant was asked to state whether they’d ever cheated on their current partner  84% Women (N = 84) said they had never cheated on their partner  16% Women (N = 16) said they had cheated  87% Men (N = 87) said they had never cheated on their partner  13% Men (N = 14) said they had cheated

6 Results 2 x 2 ANOVA Contrary to hypotheses:  There was no relationship between men’s 2D:4D and overall levels of self- reported mate guarding  There was no relationship between 2D:4D and intrasexual physical aggression Consistent with hypotheses:  Men with a lower 2D:4D were more likely to state that they made intrasexual threats  Men with more masculine 2D:4D were more threatening and physically aggressive toward their partners  Men were more threatening and physically aggressive when their partner stated she cheated  Women were more resistant to mate guarding when they cheated on their current partner

7 Discussion Overall mate guarding was not significantly correlated with 2D:4D Low 2D:4D men were more threatening and physically aggressive toward their partners than high 2D:4D men 2D:4D was not correlated with behavioral aggression in women Women were more resistant to their partner’s mate guarding when he had high 2D:4D When the costs of resistance become too high, women may tolerate mate guarding

8 Critical Review Limitations:  Unable to say whether participants’ 2D:4D is related to their current circulating hormone levels  Unable to say whether these results would differ for people who have children Strengths:  The use of couples in romantic relationships  Uncommon and allows for assessment of interactions between partners  Linking two areas of research; 2D:4D and mate guarding

9 Quiz 1. Which level of 2D:4D indicates a higher tendency towards aggressive behavior and mate guarding?  A. Low 2D:4D  B. High 2D:4D  C. Both A and B 2. The woman participants in the study reported cheating more than the male participants (T/F) 3. Women may allow mate guarding by men with low 2D:4D because…  A. They respect them more than high 2D:4D  B. They think low 2D:4D are sexier than high 2D:4D  C. It is too costly to resist them 4. How many questionnaires did the participants completed?  A. 1  B. 2  C D:4D was correlated with behavioral aggression in women (T/F) 6. Men were more threatening and physically aggressive when their partner stated she cheated (T/F)


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