Poor Infant Sleep May Predict Problematic Toddler Behaviour

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Poor Infant Sleep May Predict Problematic Toddler Behaviour

A study recently published in Developmental Neuropsychology finds a definite link between poor infant sleep and compromised attention and behaviour at the toddler stage. The research discovered that one-year-olds who experienced fragmented sleep were more likely to have difficulties concentrating and to exhibit behavioural problems at three and four years of age.

The research was led by Prof. Avi Sadeh of Tel Aviv University’s School of Psychological Sciences and conducted by a team that included his TAU colleagues Yael Guri and Prof. Yair Bar-Haim; Dr. Gali De Marcas of the Gordon College of Education in Haifa; and Prof. Andrea Berger and Dr. Liat Tikotzky of Ben Gurion University of the Negev.

A predictor of future problems

“Many parents feel that, after a night without enough sleep, their infants are not at their ‘best.’ But the real concern is whether infant sleep problems — i.e. fragmented sleep, frequent night wakings — indicate any future developmental problems,” said Prof. Sadeh. “The fact that poor infant sleep predicts later attention and behaviour irregularities has never been demonstrated before using objective measures.”

The team assessed the sleep patterns of infants at TAU’s Laboratory for Children’s Sleep Disorders, where Prof. Sadeh is director. The initial study included 87 one-year-olds and their parents. They revisited the lab when the infants were three to four years old. According to the study, “Night-wakings of self-soothing infants go unnoticed by their parents. Therefore, objective infant sleep measures are required when assessing the role of sleep consolidation or sleep fragmentation and its potential impact on the developing child.”

To accomplish this, the researchers used wristwatch-like devices to objectively determine sleep patterns at the age of one, and in the follow-up visits they used a computerised attention test, the Spatial-Stroop task, to assess attentional executive control. They also referred to parental reports to determine signs of behavioural problems.

The results revealed significant predictive and concomitant correlations between infant sleep and toddler attention regulation and behaviour problems. The study points to significant ties between sleep quality markers (sleep percentage and number of night wakings) at one year of age and attention and behaviour regulation markers two to three years later.

Is it genetic?

“We don’t know what the underlying causes are for the lower sleep quality and later behaviour regulation problems in these children,” said Prof. Sadeh. “There may be genetic or environmental causes adversely affecting both the children’s sleep and their development in other domains. Our findings, however, support the importance of early diagnosis and treatment of sleep problems in infants and young children. Early interventions for infant sleep problems, very effective in improving sleep quality, could potentially improve later attention and behaviour regulation.”

The researchers are currently exploring the underlying characteristics of children who are considered “good sleepers” at the age of nine to 18 months.

(Source: Tel-Aviv University, Developmental Neuropsychology)

Date Created: November 1, 2015

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