Table 1.
(A): Details of included studies on maternal love. (B): Details of included studies of passionate love.
| (A) | ||||||||
| First Author | Year | Categories of Love | Numbers of Participants | Mean Age of Participants’ Own Child | Mean Age of Participants | Experimental Stimuli | Contrasts | Numbers of Foci |
| Lorberbaum [27] | 2002 | Maternal | 10 | 6.18 weeks | 30.55 | Cry sound and white noise (auditory) | Infant cry > Rest | 80 |
| Bartles [22] | 2004 | Maternal | 20 | 24.4 months | 34 | Pictures (visual) | Own child > Acquainted child | 28 |
| Nitschke [28] | 2004 | Maternal | 6 | 3–5 months | No report | Pictures of faces (visual) | Own infant > Unfamiliar infant | 6 |
| Leibenluft [29] | 2004 | Maternal | 7 | 5–12 years | 32.9 | Pictures of faces (visual) | Own child > Familiar child | 36 |
| Ranote [30] | 2004 | Maternal | 10 | 25.6 months | 26 | Video Clip (visual-auditory) | Own infant > Unknown infant | 3 |
| Noriuchi [31] | 2008 | Maternal | 13 | 16.5 months | 31.1 | Video Clip (visual-auditory) | Own infant > Other infant | 81 |
| Lenzi [32] | 2009 | Maternal | 16 | 9.5 months | 33.7 | Pictures of faces (visual) | Own child > Acquainted child | 7 |
| Strathearn [33] | 2008 | Maternal | 28 | 6.7 months | 30.2 | Pictures of faces (visual) | Own infant > Unknown infant | 67 |
| Strathearn [34] | 2009 | Maternal | 30 | 7 months | No report | Pictures of faces (visual) | Own infant > Unknown infant | 46 |
| Atzil [35] | 2011 | Maternal | 23 | 4–6 months | 22–37 | Pictures of faces (visual) | Own infant > Unfamiliar infant | 21 |
| Barret [36] | 2012 | Maternal | 22 | 3 months | 25–35 | Pictures of faces (visual) | Own infant > Unfamiliar infant | 32 |
| Wan [37] | 2014 | Maternal | 20 | 6.2 months | 32 | Video Clip (visual-auditory) | Own infant > Unknown infant | 40 |
| (B) | ||||||||
| First Author | Year | Categories of Love | Numbers of Participants (Female) | Mean Age of Participants | Experimental Stimuli | Contrasts | Numbers of Foci | |
| Bartels & Zeki [21] | 2000 | Passionate | 17 (11) | 24.5 | Pictures of faces (visual) | Lover > Familiar friend | 13 | |
| Aron [38] | 2005 | Passionate | 17 (10) | 20.6 | Picture (visual) | Lover > Familiar friend | 8 | |
| Ortigue [39] | 2007 | Passionate | 36 (36) | 20.1 | Words (visual) | Lover > Familiar friend Lover > Noun |
14 4 |
|
| Kim [40] | 2009 | Passionate | 10 (5) | 21.1 | Pictures of faces (visual) | Lover > Familiar friend | 29 | |
| Zeki [41] | 2010 | Passionate (opposite and same sex) |
24 (12) | 26.3 | Pictures of faces (visual) | Lover > Familiar friend | 11 | |
| Stoessel [42] | 2011 | Passionate | 12 (6) | 24.08 | Picture (visual) | Lover > Erotic pictures | 16 | |
| Xu [43] | 2011 | Passionate (Chinese participants) |
18 (10) | 21.61 | Pictures of faces (visual) | Lover > Familiar friend | 8 | |
| Xu [44] | 2012 | Passionate | 18 (0) | 25.11 | Picture (visual) | Lover > Familiar friend | 10 | |
| Acevedo [26] | 2012 | Passionate (long-term) | 17 (10) | 52.85 | Pictures of faces (visual) | Lover > Familiar acquaintance Lover > Close friend |
30 26 |
|