| Study | Crnic et al. (1984): study US 1981 |
| Title | Maternal Stress and Social Support: Effects on the Mother-Infant Relationship from Birth to Eighteen Months. |
| Source | American Journal of Orthopsychiatry, 1984, Vol. 54, 224 - 235 |
| Public | Mother-child pairs, followed 18 months after birth, USA, 1981-82 |
| Sample | Sampling not reported |
| Non-Response | Attrition at T2: 10%, at T3: 14% |
| Respondents N = | 105 |
| Correlate | |
| Author's label | Past happiness |
| Our classification | Recent happiness (< 1 year ago) |
| Operationalization | T1: 1 month after birth of child T2: 8 months after birth of child T3: 18 months after birth of child |
| Observed Relation with Happiness | ||
| Happiness Measure | Statistics | Elaboration/Remarks |
| O-QLS-c-sq-v-5-a | r=+.61 | Tl happiness by T2 happiness |
| O-QLS-c-sq-v-5-a | r=+.51 | Tl happiness by T3 happiness |
| Code | Full Text |
| O-QLS-c-sq-v-5-a | Selfreport on single question: "When you take everything into consideration, your child, your adult life, etc, how would you describe your current life situation.....?' 1 things are very bad right now 2 3 4 5 things are very good (Response options not fully reported) |
| Symbol | Explanation |
| r | PRODUCT-MOMENT CORRELATION COEFFICIENT (Also "Pearson's correlation coefficient' or simply 'correlation coefficient') Type: test statistic. Measurement level: Correlate: metric, Happiness: metric Range: [-1; +1] Meaning: r = 0 « no correlation , r = 1 « perfect correlation, where high correlate values correspond with high happiness values, and r = -1 « perfect correlation, where high correlate values correspond with low happiness values. |