dat.demir2022.RdResults from 26 studies on the reliability of the Mother-to-Infant Bonding Scale (MIBS).
dat.demir2022The data frame contains the following columns:
| studyid | numeric | study ID |
| esid | numeric | effect size ID |
| author | character | author(s) of the study |
| year | numeric | publication year |
| pubtype | character | publication type (Article or Thesis) |
| country | character | country |
| participants | character | participant characteristics |
| n | numeric | sample size |
| alpha | numeric | Cronbach's alpha |
| items | numeric | number of items in the scale |
The Mother-to-Infant Bonding Scale (MIBS) is an 8-item Likert-type questionnaire to evaluate caregiver-infant attachment. Demir et al. (2022) carried out a meta-analysis of 26 studies (reporting 33 Cronbach's alpha values) to assess the reliability of the scale.
Demir, E., Öz, S., Aral, N., & Gürsoy, F. (2022). A reliability generalization meta-analysis of the Mother-to-Infant Bonding Scale. Psychological Reports, 127(1), 447–464. https://doi.org/10.1177/00332941221114413
psychology, Cronbach's alpha, reliability generalization
### copy data into 'dat' and examine data
dat <- dat.demir2022
dat
#> studyid esid author year pubtype country participants n
#> 1 1 1 Wittkowski et al. 2007 Article UK Postnatal mothers 98
#> 2 1 2 Wittkowski et al. 2007 Article UK Postnatal mothers 98
#> 3 2 3 Horsch et al. 2017 Article Switzerland Postnatal mothers 287
#> 4 3 4 Handelzalts et al. 2016 Article Israel Expectant mothers 33
#> 5 4 5 Ertan et al. 2021 Article France Postnatal mothers 916
#> 6 5 6 Eapen et al. 2014 Article Australia Expectant mothers 127
#> 7 6 7 Coktay et al. 2020 Article Turkey Postnatal mothers 335
#> 8 7 8 Mbabazi 2014 Thesis USA Postnatal mothers 89
#> 9 8 9 Calhoun 2015 Thesis USA Postnatal mothers 107
#> 10 9 10 Lim 2013 Thesis USA Postnatal mothers 13
#> 11 10 11 Suchy et al. 2020 Article USA Postnatal fathers 98
#> 12 11 12 Shreffler et al. 2021 Article USA Expectant mothers 177
#> 13 12 13 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 210
#> 14 12 14 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 91
#> 15 12 15 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 301
#> 16 13 16 Roth et al. 2021 Article USA Postnatal mothers 125
#> 17 14 17 Mendelson et al. 2018 Article USA Postnatal mothers 27
#> 18 15 18 Mayopoulos et al. 2021 Article USA Expectant mothers 2251
#> 19 16 19 Foli et al. 2013 Article USA Adoptive fathers 38
#> 20 17 20 South et al. 2012 Article USA Adoptive mothers 251
#> 21 18 21 Foli et al. 2012 Article USA Adoptive mothers 284
#> 22 19 22 Shorey et al. 2019 Article Singapore Expectant mothers and fathers 236
#> 23 19 23 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 210
#> 24 19 24 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 194
#> 25 19 25 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 186
#> 26 20 26 Foli et al. 2012 Article USA Postnatal mothers 113
#> 27 21 27 Tichelman et al. 2021 Article The Netherlands Postnatal mothers 1528
#> 28 22 28 Escasa 2012 Thesis USA Postnatal mothers 260
#> 29 23 29 Taylor et al. 2005 Article UK Postnatal mothers 144
#> 30 24 30 Morelius et al. 2021 Article Sweden Postnatal mothers 63
#> 31 25 31 Van Bussel et al. 2010 Article Belgium Postnatal mothers 263
#> 32 25 32 Van Bussel et al. 2010 Article Belgium Postnatal mothers 202
#> 33 26 33 Shoemark et al. 2021 Article USA Postnatal mothers 18
#> alpha items
#> 1 0.55 8
#> 2 0.49 8
#> 3 0.77 8
#> 4 0.63 8
#> 5 0.82 8
#> 6 0.91 8
#> 7 0.79 8
#> 8 0.77 8
#> 9 0.52 7
#> 10 0.92 8
#> 11 0.36 8
#> 12 0.71 8
#> 13 0.73 8
#> 14 0.73 8
#> 15 0.73 8
#> 16 0.76 8
#> 17 0.71 8
#> 18 0.78 8
#> 19 0.86 8
#> 20 0.90 8
#> 21 0.89 8
#> 22 0.70 8
#> 23 0.58 8
#> 24 0.66 8
#> 25 0.62 8
#> 26 0.89 8
#> 27 0.67 8
#> 28 0.69 8
#> 29 0.71 8
#> 30 0.68 8
#> 31 0.67 8
#> 32 0.58 8
#> 33 0.45 8
### load metafor package
library(metafor)
### transform the alpha values using the Bonett (2022) transformation
dat <- escalc(measure="ABT", ai=alpha, ni=n, mi=items, data=dat)
dat
#>
#> studyid esid author year pubtype country participants n
#> 1 1 1 Wittkowski et al. 2007 Article UK Postnatal mothers 98
#> 2 1 2 Wittkowski et al. 2007 Article UK Postnatal mothers 98
#> 3 2 3 Horsch et al. 2017 Article Switzerland Postnatal mothers 287
#> 4 3 4 Handelzalts et al. 2016 Article Israel Expectant mothers 33
#> 5 4 5 Ertan et al. 2021 Article France Postnatal mothers 916
#> 6 5 6 Eapen et al. 2014 Article Australia Expectant mothers 127
#> 7 6 7 Coktay et al. 2020 Article Turkey Postnatal mothers 335
#> 8 7 8 Mbabazi 2014 Thesis USA Postnatal mothers 89
#> 9 8 9 Calhoun 2015 Thesis USA Postnatal mothers 107
#> 10 9 10 Lim 2013 Thesis USA Postnatal mothers 13
#> 11 10 11 Suchy et al. 2020 Article USA Postnatal fathers 98
#> 12 11 12 Shreffler et al. 2021 Article USA Expectant mothers 177
#> 13 12 13 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 210
#> 14 12 14 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 91
#> 15 12 15 Stuijfzand et al. 2020 Article Switzerland Postnatal mothers 301
#> 16 13 16 Roth et al. 2021 Article USA Postnatal mothers 125
#> 17 14 17 Mendelson et al. 2018 Article USA Postnatal mothers 27
#> 18 15 18 Mayopoulos et al. 2021 Article USA Expectant mothers 2251
#> 19 16 19 Foli et al. 2013 Article USA Adoptive fathers 38
#> 20 17 20 South et al. 2012 Article USA Adoptive mothers 251
#> 21 18 21 Foli et al. 2012 Article USA Adoptive mothers 284
#> 22 19 22 Shorey et al. 2019 Article Singapore Expectant mothers and fathers 236
#> 23 19 23 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 210
#> 24 19 24 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 194
#> 25 19 25 Shorey et al. 2019 Article Singapore Postnatal mothers and fathers 186
#> 26 20 26 Foli et al. 2012 Article USA Postnatal mothers 113
#> 27 21 27 Tichelman et al. 2021 Article The Netherlands Postnatal mothers 1528
#> 28 22 28 Escasa 2012 Thesis USA Postnatal mothers 260
#> 29 23 29 Taylor et al. 2005 Article UK Postnatal mothers 144
#> 30 24 30 Morelius et al. 2021 Article Sweden Postnatal mothers 63
#> 31 25 31 Van Bussel et al. 2010 Article Belgium Postnatal mothers 263
#> 32 25 32 Van Bussel et al. 2010 Article Belgium Postnatal mothers 202
#> 33 26 33 Shoemark et al. 2021 Article USA Postnatal mothers 18
#> alpha items yi vi
#> 1 0.55 8 0.7985 0.0238
#> 2 0.49 8 0.6733 0.0238
#> 3 0.77 8 1.4697 0.0080
#> 4 0.63 8 0.9943 0.0737
#> 5 0.82 8 1.7148 0.0025
#> 6 0.91 8 2.4079 0.0183
#> 7 0.79 8 1.5606 0.0069
#> 8 0.77 8 1.4697 0.0263
#> 9 0.52 7 0.7340 0.0222
#> 10 0.92 8 2.5257 0.2078
#> 11 0.36 8 0.4463 0.0238
#> 12 0.71 8 1.2379 0.0131
#> 13 0.73 8 1.3093 0.0110
#> 14 0.73 8 1.3093 0.0257
#> 15 0.73 8 1.3093 0.0076
#> 16 0.76 8 1.4271 0.0186
#> 17 0.71 8 1.2379 0.0914
#> 18 0.78 8 1.5141 0.0010
#> 19 0.86 8 1.9661 0.0635
#> 20 0.90 8 2.3026 0.0092
#> 21 0.89 8 2.2073 0.0081
#> 22 0.70 8 1.2040 0.0098
#> 23 0.58 8 0.8675 0.0110
#> 24 0.66 8 1.0788 0.0119
#> 25 0.62 8 0.9676 0.0124
#> 26 0.89 8 2.2073 0.0206
#> 27 0.67 8 1.1087 0.0015
#> 28 0.69 8 1.1712 0.0089
#> 29 0.71 8 1.2379 0.0161
#> 30 0.68 8 1.1394 0.0375
#> 31 0.67 8 1.1087 0.0088
#> 32 0.58 8 0.8675 0.0114
#> 33 0.45 8 0.5978 0.1429
#>
### meta-analysis using a random-effects model
res <- rma(yi, vi, data=dat)
res
#>
#> Random-Effects Model (k = 33; tau^2 estimator: REML)
#>
#> tau^2 (estimated amount of total heterogeneity): 0.2318 (SE = 0.0637)
#> tau (square root of estimated tau^2 value): 0.4814
#> I^2 (total heterogeneity / total variability): 96.34%
#> H^2 (total variability / sampling variability): 27.36
#>
#> Test for Heterogeneity:
#> Q(df = 32) = 584.8126, p-val < .0001
#>
#> Model Results:
#>
#> estimate se zval pval ci.lb ci.ub
#> 1.3331 0.0882 15.1193 <.0001 1.1603 1.5059 ***
#>
#> ---
#> Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#>
### back-transform the results
predict(res, transf=transf.iabt, digits=2)
#>
#> pred ci.lb ci.ub pi.lb pi.ub
#> 0.74 0.69 0.78 0.31 0.90
#>