Long-Term Memory in Infancy. Electrophysiological and Behavioral Measures of Declarative Memory in 14-Month-Olds.

This paper presents a pilot study investigating the development of declarative memory in infancy, by creating a stimulus material appropriate for recording Event-Related Potentials (ERPs) during memory encoding. The material was designed to establish associations between pictures, and a negative component with a fronto-central distribution (Nc) was studied as a reflection of learning. In addition an established test of declarative memory, deferred imitation (DI), was performed in order to serve as a behavioral correlate. Information concerning general development was also collected, including an assessment of productive vocabulary as measured by the Swedish version of the MacArthur Communicative Developmental Inventories. The participants were 23 typically developing 14-month-old infants. DI data from all participants was analyzed and correlated with other developmental measures. A strong positive correlation was found between productive vocabulary and DI performance. Five participants generated data for ERP analysis, which revealed the expected Nc component but failed to show the predicted patterns. This may be explained by the current presentation of the stimulus material not making the associations clear to the infants. Suggestions for improvements of the ERP design are discussed

Reduced Alternating Gaze During Social Interaction in Infancy is Associated with Elevated Symptoms of Autism in Toddlerhood

In typical development, infants often alternate their gaze between their interaction partners and interesting stimuli, increasing the probability of joint attention toward surrounding objects and creating opportunities for communication and learning. Children with Autism Spectrum Disorder (ASD) have been found to engage less in behaviors that can initiate joint attention compared to typically developing children, but the role of such atypicalities in the development of ASD during infancy is not fully understood. Here, using eye tracking technology in a live setting, we show that 10-month-olds at high familial risk for ASD engage less in alternating gaze during interaction with an adult compared to low risk infants. These differences could not be explained by low general social preference or slow visual disengagement, as the groups performed similarly in these respects. We also found that less alternating gaze at 10 months was associated with more social ASD symptoms and less showing and pointing at 18 months. These relations were similar in both the high risk and the low risk groups, and remained when controlling for general social preference and disengagement latencies. This study shows that atypicalities in alternating gaze in infants at high risk for ASD emerge already during the first 10 months of life - a finding with theoretical as well as potential practical implications

Atypical Development of Attentional Control Associates with Later Adaptive Functioning, Autism and ADHD Traits

Funder: H2020 European Research Council; doi: http://dx.doi.org/10.13039/100010663Funder: Research Foundation FlandersFunder: Universiteit Gent; doi: http://dx.doi.org/10.13039/501100004385Funder: Marguerite-Marie DelacroixFunder: Autistica; doi: http://dx.doi.org/10.13039/100011706Funder: Riksbankens Jubileumsfond; doi: http://dx.doi.org/10.13039/501100004472; Grant(s): NHS14-1802:1Funder: K.F. Hein FondsFunder: Scott Family Junior Research FellowshipAbstract: Autism is frequently associated with difficulties with top-down attentional control, which impact on individuals’ mental health and quality of life. The developmental processes involved in these attentional difficulties are not well understood. Using a data-driven approach, 2 samples (N = 294 and 412) of infants at elevated and typical likelihood of autism were grouped according to profiles of parent report of attention at 10, 15 and 25 months. In contrast to the normative profile of increases in attentional control scores between infancy and toddlerhood, a minority (7–9%) showed plateauing attentional control scores between 10 and 25 months. Consistent with pre-registered hypotheses, plateaued growth of attentional control was associated with elevated autism and ADHD traits, and lower adaptive functioning at age 3 years

Cyclophilin C-associated protein (CyCAP) knock-out mice spontaneously develop colonic mucosal hyperplasia and exaggerated tumorigenesis after treatment with carcinogen azoxymethane1

<p>Abstract</p> <p>Background</p> <p>The discovery of a "serrated neoplasia pathway" has highlighted the role of hyperplastic lesions of the colon as the significant precursor of colorectal adenocarcinoma. In mice, hyperplasia of the colonic mucosa is a regular phenomenon after a challenge with colonic carcinogens indicating that mucosal hyperproliferation and thickening, even without cytological dysplasia, represents an early pre-malignant change. Cyclophilin C-associated protein (CyCAP) has been described to down-modulate endotoxin signaling in colorectal murine mucosa and is a murine orthologue of the tumor-associated antigen 90 K (TAA90K)/mac-2-binding protein.</p> <p>Methods</p> <p>Female Balb/c wild-type (WT) and CyCAP knock-out (KO) mice (6–8 weeks old) were administered 2 or 6 weekly subcutaneous injections of azoxymethane. The animals were evaluated post-injection at six weeks for aberrant crypt foci (ACF) study and at five months for colon tumor measurement. The thickness of the colon crypts was measured in microns and the number of colonocytes per crypt was also determined in well-oriented crypts. Morphometric analyses of the colon mucosa were also performed in untreated 6–8 weeks old KO and WT animals. Formalin-fixed/paraffin-embedded colon sections were also studied by immunohistochemistry to determine the Ki-67 proliferation fraction of the colon mucosa, β-catenin cellular localization, cyclin D1, c-myc, and lysozyme in Paneth cells.</p> <p>Results</p> <p>Cyclophilin C-associated protein (CyCAP)^-/-mice, spontaneously developed colonic mucosal hyperplasia early in life compared to wild-type mice (WT) (p < 0.0001, T-test) and crypts of colonic mucosa of the (CyCAP)^-/-mice show higher proliferation rate (p = 0.039, Mann-Whitney Test) and larger number of cyclin D1-positive cells (p < 0.0001, Mann-Whitney Test). Proliferation fraction and cyclin D1 expression showed positive linear association (p = 0.019, Linear-by-Linear Association). The hyperplasia was even more pronounced in CyCAP^-/-mice than in WT after challenge with azoxymethane (p = 0.005, T-test). The length of the crypts (r = 0.723, p = 0.018, Spearman Correlation) and the number of colonocytes per crypt (r = 0.863, p = 0.001, Spearman Correlation) in non-tumorous areas were positively associated with azoxymethane-induced number of tumors. CyCAP^-/-developed larger numbers of tumors than WT animals (p = 0.003, T-Test) as well as overall larger tumor mass (p = 0.016, T-Test). Membranous β-catenin was focally overexpressed in KO mice including proliferative zone of the crypts.</p> <p>Conclusion</p> <p>CyCAP^-/-represent the first described model of spontaneous colonic mucosal hyperplasia. We conclude that CyCAP-deficient mice spontaneously and after challenge with carcinogen develop significantly more colorectal mucosal hyperplasia, an early stage in murine colonic carcinogenesis.</p

Joint Attention in Development : Insights from Children with Autism and Infant Siblings

Compared to other children, children with Autism Spectrum Disorder (ASD) are known to engage less in joint attention - the sharing of attention between two individuals toward a common object or event. Joint attention behaviors - for example gaze following, alternating gaze, and pointing - play an important role in early development, as they provide a foundation for learning and social interaction. Study I and Study II focused on infant siblings of children with ASD. These infants, often termed high risk (HR) infants, have an increased probability of receiving a later ASD diagnosis. Studying them therefore allows for the detection of early signs of ASD. Live eye tracking was used to investigate different joint attention behaviors at 10 months of age. Study I showed that omitting the head movement that usually accompany experimenters’ eye gaze shifts in similar designs reduced gaze following performance in the HR group, but not in a group of infants at low risk (LR) for ASD. HR infants may thus be less sensitive to eye information, or may need more salient cues in order to follow gaze optimally. Study II focused on the infants’ tendency to initiate joint attention by alternating their gaze between a person and an event. LR infants engaged more in alternating gaze than HR infants, and less alternating gaze in infancy was associated with more ASD symptoms at 18 months. This relation remained when controlling for visual disengagement and general social interest in infancy. Study III explored the role of joint attention later in development, by investigating the microstructure of the looking behaviors of autistic and typically developing children (~6 years old). The results indicated that seeing somebody look at an object influenced the processing of that object less in autistic children than in the typically developing controls. Both groups followed gaze effectively, suggesting that differences in joint attention at this age may be subtle, but detectable with eye tracking technology. Together, the studies contribute to our understanding of the role that joint attention atypicalities play both in the early development of infants at risk for ASD, and later in the development of children with a confirmed diagnosis

Joint Attention in Development : Insights from Children with Autism and Infant Siblings

Compared to other children, children with Autism Spectrum Disorder (ASD) are known to engage less in joint attention - the sharing of attention between two individuals toward a common object or event. Joint attention behaviors - for example gaze following, alternating gaze, and pointing - play an important role in early development, as they provide a foundation for learning and social interaction. Study I and Study II focused on infant siblings of children with ASD. These infants, often termed high risk (HR) infants, have an increased probability of receiving a later ASD diagnosis. Studying them therefore allows for the detection of early signs of ASD. Live eye tracking was used to investigate different joint attention behaviors at 10 months of age. Study I showed that omitting the head movement that usually accompany experimenters’ eye gaze shifts in similar designs reduced gaze following performance in the HR group, but not in a group of infants at low risk (LR) for ASD. HR infants may thus be less sensitive to eye information, or may need more salient cues in order to follow gaze optimally. Study II focused on the infants’ tendency to initiate joint attention by alternating their gaze between a person and an event. LR infants engaged more in alternating gaze than HR infants, and less alternating gaze in infancy was associated with more ASD symptoms at 18 months. This relation remained when controlling for visual disengagement and general social interest in infancy. Study III explored the role of joint attention later in development, by investigating the microstructure of the looking behaviors of autistic and typically developing children (~6 years old). The results indicated that seeing somebody look at an object influenced the processing of that object less in autistic children than in the typically developing controls. Both groups followed gaze effectively, suggesting that differences in joint attention at this age may be subtle, but detectable with eye tracking technology. Together, the studies contribute to our understanding of the role that joint attention atypicalities play both in the early development of infants at risk for ASD, and later in the development of children with a confirmed diagnosis

Joint Attention in Development : Insights from Children with Autism and Infant Siblings

Compared to other children, children with Autism Spectrum Disorder (ASD) are known to engage less in joint attention - the sharing of attention between two individuals toward a common object or event. Joint attention behaviors - for example gaze following, alternating gaze, and pointing - play an important role in early development, as they provide a foundation for learning and social interaction. Study I and Study II focused on infant siblings of children with ASD. These infants, often termed high risk (HR) infants, have an increased probability of receiving a later ASD diagnosis. Studying them therefore allows for the detection of early signs of ASD. Live eye tracking was used to investigate different joint attention behaviors at 10 months of age. Study I showed that omitting the head movement that usually accompany experimenters’ eye gaze shifts in similar designs reduced gaze following performance in the HR group, but not in a group of infants at low risk (LR) for ASD. HR infants may thus be less sensitive to eye information, or may need more salient cues in order to follow gaze optimally. Study II focused on the infants’ tendency to initiate joint attention by alternating their gaze between a person and an event. LR infants engaged more in alternating gaze than HR infants, and less alternating gaze in infancy was associated with more ASD symptoms at 18 months. This relation remained when controlling for visual disengagement and general social interest in infancy. Study III explored the role of joint attention later in development, by investigating the microstructure of the looking behaviors of autistic and typically developing children (~6 years old). The results indicated that seeing somebody look at an object influenced the processing of that object less in autistic children than in the typically developing controls. Both groups followed gaze effectively, suggesting that differences in joint attention at this age may be subtle, but detectable with eye tracking technology. Together, the studies contribute to our understanding of the role that joint attention atypicalities play both in the early development of infants at risk for ASD, and later in the development of children with a confirmed diagnosis

Same-sex mothers experiences of equal treatment, parenting stress and disclosure to offspring : a population-based study of parenthood following identity-release sperm donation

STUDY QUESTION What are the experiences of same-sex mothers following identity-release sperm donation regarding equal treatment in society, parenting stress and disclosure to child? SUMMARY ANSWER Mothers predominantly reported equal treatment in society, low levels of parenting stress and early disclosure of the donor conception to the child, and half of the couples had also informed the child of his/her right to obtain the donors identity. WHAT IS KNOWN ALREADY The number of two-mother families is increasing, and previous studies have reported about challenges related to heteronormativity, discrimination and the status of the non-birth mother. Same-sex mothers have been found to disclose the childs donor conception earlier than different-sex parents, but little is known regarding disclosure of the childs right to obtain identifying information about the donor. STUDY DESIGN, SIZE, DURATION The present study concerns the fourth wave of data collection of a nation-wide longitudinal study. A total of 143 same-sex mothers (73% response rate) following identity-release sperm donation completed individual surveys when their donor-conceived child had reached age 7. These women represent a total of 82 couples who had undergone sperm donation treatment. PARTICIPANTS/MATERIALS, SETTING, METHODS The study is part of the longitudinal Swedish Study on Gamete Donation (SSGD). Couples accepted for gamete donation treatment at seven Swedish University hospitals were recruited between 2005 and 2008 and were requested to complete postal surveys during four waves of data collection. The present study sample includes same-sex mothers who completed a survey when their donor-conceived child had reached 7 years of age. Data were collected with the Swedish Parenting Stress Questionnaire (SPSQ), and study-specific items on experiences of treatment in society and disclosure behavior. Group comparisons (birth mothers vs non-birth mothers) were conducted using Chi(2)-tests, independent t-tests and Mann-Whitney U-tests, and written comments provided for open-response items were analyzed by qualitative content analysis. MAIN RESULTS AND ROLE OF CHANCE The mothers were generally open about the childs donor conception and the large majority (&amp;gt;80%) reported being treated positively and in the same way as other parents. However, satisfaction with treatment in health care settings was significantly lower than that reported in contacts with the childs school and recreational activities (P &amp;lt; 0.001) and open-response comments indicate that this may be related predominantly to heteronormative language and assumptions. Birth mothers and non-birth mothers reported similar treatment in society and similar levels of parenting stress. All but one couple had already talked with their 7-year-old child about his/her conception with donor sperm. Half of the couples had also informed the child about his/her opportunity to obtain identifying information about the donor, and remaining couples planned later disclosure. Childrens reactions were generally described as neutral, positive or characterized by interest and curiosity. LIMITATIONS, REASONS FOR CAUTION The present study was performed within the context of the Swedish legislation on identity-release donation, which limits the generalizability to same-sex couples using anonymous or known sperm donors. Although no evidence of attrition bias was found, it is possible that those couples who initially declined participation in the SSGD (23%) or dropped out at the fourth wave of data collection (27%) differ from the study sample in terms of variables that we were unable to control for. WIDER IMPLICATION OF THE FINDINGS The present finding that most same-sex mothers in a population-based sample experience equal treatment in society is encouraging and validates previous results from predominantly qualitative studies. Nevertheless, the fact that a subgroup experiences discrimination and less favorable treatment indicates that further action is needed, particularly in child health care settings. The present study is the first to report on the timing of parents disclosure of the childs right to identifying donor information and suggests that disclosure during preschool ages is feasible and does not appear to be related to negative consequences. In view of the increased availability and use of identity-release donation, there is a pressing need to investigate parents intentions, behaviors and needs with regard to talking with their child about his/her opportunity to obtain the donors identity. STUDY FUNDING/COMPETING INTEREST(S) Financial support from the Swedish Research Council (2013-2712) and the Swedish Research Council for Health, Working Life and Welfare (2014-00876). There are no conflicts of interest to declare.Funding Agencies|Swedish Research Council [2013-2712]; Swedish Research Council for Health, Working Life and Welfare [2014-00876]</p

Gaze Following in Children with Autism : Do High Interest Objects Boost Performance?

This study tested whether including objects perceived as highly interesting by children with autism during a gaze following task would result in increased first fixation durations on the target objects. It has previously been found that autistic children differentiate less between an object another person attends to and unattended objects in terms of this measure.  Less differentiation between attended and unattended objects in ASD as compared to control children was found in a baseline condition, but not in the high interest condition. However, typically developing children differentiated less between attended and unattended objects in the high interest condition than in the baseline condition, possibly reflecting reduced influence of gaze cues on object processing when objects themselves are highly interesting

What are you looking at? : Gaze following with and without target objects in ASD and typical development

Children with autism spectrum disorder (ASD) display difficulties with response to joint attention in natural settings but often perform comparably to typically developing (TD) children in experimental studies of gaze following. Previous work comparing infants at elevated likelihood for ASD versus TD infants has manipulated aspects of the gaze cueing stimulus (e.g. eyes only versus head and eyes together), but the role the peripheral object being attended to is not known. In this study of infants at elevated likelihood of ASD (N?=?97) and TD infants (N?=?29), we manipulated whether or not a target object was present in the cued area. Performance was assessed at 10, 14, and 18?months, and diagnostic assessment was conducted at age 3 years. The results showed that although infants with later ASD followed gaze to the same extent as TD infants in all conditions, they displayed faster latencies back to the model?s face when (and only when) a peripheral object was absent. These subtle atypicalities in the gaze behaviors directly after gaze following may implicate a different appreciation of the communicative situation in infants with later ASD, despite their ostensively typical gaze following ability.Lay abstractDuring the first year of life, infants start to align their attention with that of other people. This ability is called joint attention and facilitates social learning and language development. Although children with autism spectrum disorder (ASD) are known to engage less in joint attention compared to other children, several experimental studies have shown that they follow other?s gaze (a requirement for visual joint attention) to the same extent as other children. In this study, infants? eye movements were measured at age 10, 14, and 18?months while watching another person look in a certain direction. A target object was either present or absent in the direction of the other person?s gaze. Some of the infants were at elevated likelihood of ASD, due to having an older autistic sibling. At age 3?years, infants were assessed for a diagnosis of ASD. Results showed that infants who met diagnostic criteria at 3?years followed gaze to the same extent as other infants. However, they then looked back at the model faster than typically developing infants when no target object was present. When a target object was present, there was no difference between groups. These results may be in line with the view that directly after gaze following, infants with later ASD are less influenced by other people?s gaze when processing the common attentional focus. The study adds to our understanding of both the similarities and differences in looking behaviors between infants who later receive an ASD diagnosis and other infants