Reflections on regression periods in the development of Catalan infants / Marta Sadurnโi and Carlos Rostan -- Detecting infant regression periods : weak signals in a noisy environment / Ashley Woolmore and John Richer -- Occurrence of regressive periods in the normal development of Swedish infants / Lisbeth B. Lindahl, Mikael Heimann, and Eva Ullstadius -- The effects of sources of "noise" on direct observation measures of regression periods : case studies of four infants' adaptations to special parental conditions / Frans X. Plooij and Hedwig H.C. van de Rijt-Plooij -- Illness peaks during infancy and regression periods / Frans X. Plooij ... [et al.] -- Multimodal distribution of SIDS and regression periods / Frans X. Plooij, Hedwig H.C. van de Rijt-Plooij, and Roelof Helmers -- Regulation of brain development and age-related changes in infants' motives : the developmental function of regressive periods / Colwyn Trevarthen and Kenneth Aitken -- The trilogy of mind / Frans X. Plooij

1. Regression (Psychology) in infants -- Cross-cultural studies
2. Mother and infant -- Cross-cultural studies
3. Attachment behavior in infants -- Cross-cultural studies
4. Mother-Child Relations
5. Regression (Psychology) -- Infant
6. Cross-Cultural Comparison
7. Object Attachment -- Infant
8. Electronic books.