Association Between Family Caregivers’ Cognitive Bias and Maternal Negative Affect: The Mediating Role of Family Functioning

The first few months after a baby arrives are a time of profound transformation. A new mother's body is healing, her sleep is fractured, and her identity is shifting into the role of a parent. During this vulnerable window, emotional struggles like anxiety or sadness are common, yet they often remain hidden beneath the surface of daily routines. To navigate this period, a mother relies heavily on the people around her—partners, parents, or in-laws—who provide the practical care and emotional support necessary for recovery. However, a critical gap can emerge in these relationships: the person giving care may not truly understand what the mother is feeling. This disconnect happens when a caregiver assumes everything is fine because the mother is not visibly crying, or conversely, when they worry more than the situation warrants. This mismatch between what a mother feels inside and what her family thinks she feels is known as cognitive bias. Understanding this gap is vital because if a family cannot accurately read a mother's emotional state, they cannot offer the right kind of help, potentially leaving her isolated in her distress.

Researchers at Nantong University in China set out to investigate this exact disconnect. They gathered a large group of 426 pairs, each consisting of a new mother and her primary family caregiver, from hospitals in Jiangsu Province. The mothers were between one and six months postpartum, and their caregivers were typically their husbands, mothers-in-law, or their own mothers. The team asked the mothers to describe their own feelings using a standard checklist of emotions, and then asked the caregivers to guess how those same mothers were feeling. By comparing these two sets of answers, the researchers could measure the size and direction of the gap. They also asked questions about the family's daily life, the quality of their relationships, and whether the mother had experienced specific health issues like breast inflammation.

The results revealed a clear and consistent pattern of misunderstanding. On average, the family caregivers tended to underestimate how much negative emotion the mothers were experiencing. While the mothers reported feeling a moderate amount of sadness, irritability, or worry, their caregivers guessed these feelings were much lower. At the same time, the caregivers overestimated how positive and happy the mothers were. This suggests that families often mistake a mother's silence or quiet endurance for emotional well-being, missing the signs of internal struggle. The study found that this gap was not random; it was influenced by several specific factors. For instance, the longer a mother spent caring for the baby alone each day, the more likely her caregiver was to underestimate her distress. The relationship between a mother and her mother-in-law also played a significant role; when that relationship was strained, the gap in understanding widened. Other factors included the mother's education level, her job, her personality type, and whether she had suffered from acute mastitis, a painful breast infection. Interestingly, when a mother had a visible physical illness like mastitis, caregivers were actually better at recognizing her negative emotions, likely because the pain and difficulty were impossible to ignore.

The researchers then looked deeper to understand how this misunderstanding affected the mother's mental health. They discovered that the gap in perception was linked to how well the family functioned as a unit. Families where the members felt close, supported each other, and solved problems together tended to have smaller gaps in understanding. More importantly, the study showed that family functioning acted as a bridge between the caregiver's misunderstanding and the mother's emotional state. When caregivers failed to recognize a mother's negative feelings, it often led to a decline in the overall quality of family interactions. This drop in family support and cohesion, in turn, was associated with higher levels of negative affect for the mother. The analysis indicated that this chain reaction—where a lack of accurate perception weakens family bonds, which then worsens the mother's mood—accounted for nearly 29 percent of the total connection between the caregiver's bias and the mother's distress. This means that while the misunderstanding itself has a direct impact, a significant portion of the harm comes from the way it erodes the family's ability to work together.

The study also highlighted that the source of the misunderstanding varied depending on who the caregiver was. Husbands were most influenced by their recent observations of their wife's mood, suggesting they rely heavily on immediate, day-to-day interactions. Mothers-in-law, however, were more affected by the mother's personality type and their recent perception of her mood, reflecting the complex interplay of generational differences and long-standing relationship dynamics. Other caregivers, such as biological fathers or fathers-in-law, showed a different pattern, where their understanding was tied to broader factors like income and education. These nuances suggest that there is no single way to fix the problem; the solution must be tailored to the specific family structure. The researchers noted that their work was limited to a specific group of first-time mothers in a particular region, so the findings may not apply to every family everywhere. Additionally, because the study was a snapshot in time, it cannot prove that the misunderstanding causes the family problems, only that they are closely linked.

Ultimately, this research points to a practical path forward for families and healthcare providers. It suggests that the key to supporting a new mother lies not just in providing physical help, but in improving the family's ability to see her emotional reality. Families need to move beyond assuming that a lack of visible distress means a lack of internal struggle. Instead, they should be encouraged to talk openly about feelings, recognizing that irritability, withdrawal, or exhaustion are valid signs of emotional need. By strengthening the family's ability to communicate and support one another, caregivers can close the gap of misunderstanding. This shift could help ensure that when a new mother is struggling, her family is ready to offer the right kind of comfort, turning a moment of isolation into an opportunity for connection and recovery.