THE Hα EMISSION OF NEARBY M DWARFS AND ITS RELATION TO STELLAR ROTATION

The high-energy emission from low-mass stars is mediated by the magnetic dynamo. Although the mechanisms by which fully convective stars generate large-scale magnetic fields are not well understood, it is clear that, as for solar-type stars, stellar rotation plays a pivotal role. We present 270 new optical spectra of low-mass stars in the Solar Neighborhood. Combining our observations with those from the literature, our sample comprises 2202 measurements or non-detections of Hα emission in nearby M dwarfs. This includes 466 with photometric rotation periods. Stars with masses between 0.1 and 0.6 M[subscript ⊙] are well-represented in our sample, with fast and slow rotators of all masses. We observe a threshold in the mass–period plane that separates active and inactive M dwarfs. The threshold coincides with the fast-period edge of the slowly rotating population, at approximately the rotation period at which an era of rapid rotational evolution appears to cease. The well-defined active/inactive boundary indicates that Hα activity is a useful diagnostic for stellar rotation period, e.g., for target selection for exoplanet surveys, and we present a mass-period relation for inactive M dwarfs. We also find a significant, moderate correlation between L[suscript Hα]/L[subscript bol] and variability amplitude: more active stars display higher levels of photometric variability. Consistent with previous work, our data show that rapid rotators maintain a saturated value of LHα/Lbol. Our data also show a clear power-law decay in L[subscript Hα]/L[subscript bol] with Rossby number for slow rotators, with an index of −1.7 ± 0.1.National Science Foundation (U.S.). Astronomy and Astrophysics Postdoctoral Fellowship (Award AST-1602597

Associations Between Early Maternal Depressive Symptom Trajectories And Toddlers’ Felt Security At 18 Months: Are Boys And Girls At Differential Risk?

The goal of this study was to evaluate whether there are sex differences in children’s vulnerability to caregiving risk, as indexed by trajectories of maternal depressive symptoms assessed from 2 to 18 monthsâ postpartum, and children’s rated attachment security in toddlerhood, adjusting for maternal social support and demographic risk. Analyses utilized longitudinal data collected for 182 African American motherâ child dyads from economically diverse backgrounds. Participants were recruited at the time of the child’s birth and followed to 18 monthsâ postpartum. Results of conditional latent growth models indicated that an increasing rate of change in level of maternal depressive symptoms over time negatively predicted toddlersâ felt attachment security. Higher social support was associated with decreasing levels of maternal depressive symptoms over time whereas higher demographic risk was associated with increasing levels of maternal depressive symptoms. A subsequent multigroup conditional latent growth model revealed that child sex moderated these associations. For male (but not female) children, a rapid increase in maternal depressive symptoms was associated with lower felt attachment security at 18 months. These findings suggest that boys, as compared to girls, may be more vulnerable to early caregiving risks such as maternal depression, with negative consequences for motherâ child attachment security in toddlerhood.RESUMENEl objetivo de este estudio fue evaluar si hay diferencias de sexo en la vulnerabilidad de los niños al riesgo de prestación de cuidado, como han indicado las trayectorias de síntomas depresivos maternos evaluadas de 2 a 18 meses después del parto, y el puntaje de la seguridad de afectividad de los niños en su temprana infancia, con ajustes basados en el apoyo social materno y el riesgo demográfico. Los análisis utilizaron información longitudinal recogida de 182 díadas de madreâ niño afroâ americanas de niveles económicamente diversos. Los participantes fueron reclutados al nacer el niño y se les dio seguimiento hasta los 18 meses después del parto. Los resultados de modelos de modelos de crecimiento latente condicionales indicaron que un incremento en el puntaje de cambio en el nivel de síntomas depresivos maternos a través del tiempo negativamente predijo la seguridad afectiva que los infantes sentían. Se asoció un más alto apoyo social con decrecientes niveles de síntomas depresivos maternos a través del tiempo, mientras que más altos riesgos demográficos se asociaron con un incrementos en los niveles de síntomas depresivos maternos. Un subsecuente modelo de crecimiento latente condicional reveló que el sexo del niño moderaba estas asociaciones. En el caso de niños varones (no así las niñas), se asoció un rápido incremento en síntomas depresivos maternos con más bajos niveles, a los 18 meses, de seguridad en la afectividad sentida. Estos resultados sugieren que los niños varones, comparados con las niñas, pudieran ser más vulnerables a los riesgos de un cuidado temprano tal como la depresión materna, con consecuencias negativas para la seguridad en la afectividad madreâ niño en la más temprana infancia.Rà SUMà Le but de cette étude était dâ évaluer s’il existe des différences entre les sexes dans la vulnérabilité des enfants au risque de la personne prenant soin d’eux, telle qu’elle est indexée par les trajectoires des symptômes dépressifs maternels évalués de 2 à 18 mois après la naissance, et la sécurité de l’attachement telle qu’elle est évaluée chez les enfants durant la petite enfance, s’ajustant au soutien social maternel et au risque démographique. Les analyses ont utilisé des données longitudinales recueillies pour 182 dyades mèresâ enfants noires américaines issues de milieux socioéconomiques divers. Les participants ont été recrutés au moment de la naissance de l’enfant et ont été suivis jusquâ à 18 mois après la naissance. Les résultats de modèles de croissance latents conditionnels ont indiqué qu’un taux croissant de changement dans le niveau des symptômes dépressifs maternels au fil du temps prédisait de manière négative la sécurité de l’attachement ressentie des jeunes enfants. Un soutien social plus élevé était lié à des niveaux décroissants de symptômes dépressifs maternels au fil du temps, alors qu’un risque démographique élevé était lié à des niveaux plus élevés de symptômes dépressifs maternels. Un modèle de croissance latente conditionnelle subséquente et multiâ groupe a révélé que le sexe de l’enfant modérait ces associations. Pour les enfants mâles (mais pas les enfants femelles) une augmentation rapide des symptômes dépressifs maternels était liée à une sécurité perçue de l’attachement plus basse à 18 mois. Ces résultats suggèrent que les garçons, comparés aux filles, peuvent être plus vulnérables aux risques liés à la personne prenant soin d’eux comme la dépression maternelle, avec des conséquences négatives pour la sécurité de l’attachement mèreâ enfant dans la petite enfance.ZUSAMMENFASSUNGDas Ziel dieser Studie war es, Geschlechtsunterschiede bei Kindern im Hinblick auf ihre Vulnerabilität bei Fürsorgerisiken zu evaluieren. Die Fürsorgerisiken wurden durch den Verlauf der mütterlichen depressiven Symptome von 2 bis 18 Monaten nach der Geburt indiziert, sowie durch die bewertete Bindungssicherheit der Kleinkinder. Dabei wurde für mütterliche soziale Unterstützung und demografische Risiken kontrolliert. Für die Analysen wurden Längsschnittdaten von 182 afroâ amerikanischen Mutterâ Kindâ Dyaden mit verschiedenen ökonomischen Hintergründen genutzt. Die Teilnehmer wurden zum Zeitpunkt der Geburt des Kindes rekrutiert und nach der Geburt für 18 Monate begleitet. Die Ergebnisse der konditionalen latenten Wachstumsmodelle zeigten, dass im Verlauf ansteigende mütterliche depressive Symptome mit der gefühlten Bindungssicherheit der Kleinkinder in einem negativen Vorhersagezusammenhang standen. Höhere soziale Unterstützung war mit einer Abnahme der mütterlichen depressiven Symptome im Verlauf der Zeit assoziiert, während ein höheres demografisches Risiko mit dem Anstieg der mütterlichen depressive Symptome assoziiert war. Ein nachfolgendes konditionales latentes Wachstumsmodell für multiple Gruppen zeigte, dass das Geschlecht des Kindes diese Assoziationen moderierte. Bei Jungen (jedoch nicht bei Mädchen) war eine rasche Zunahme der mütterlichen depressiven Symptome mit einer niedrigeren gefühlten Bindungssicherheit 18 Monate nach der Geburt assoziiert. Diese Ergebnisse deuten darauf hin, dass Jungen, verglichen mit Mädchen, hinsichtlich früher Fürsorgerisiken wie mütterlicher Depression vulnerabler sind, was wiederum mit negativen Folgen für die Bindungssicherheit zwischen Mutter und Kind im Kleinkindalter einhergehen kann.æ é ²ã ã ®ç  ç©¶ã ®ç ®ç ã ¯ã é¤ è ²ã ®ã ªã ¹ã ¯ã ¸ã ®å­ ã ©ã ã ®è å¼±æ §ã «æ §å·®ã ã ã ã ã ©ã ã ã è© ä¾¡ã ã ã 㠨㠧ã ã ã ã ã ã ¯ã å ºç £å¾ 2â ¼18ã æ ã «è© ä¾¡ã ã ã æ¯ è¦ªã ®æ ã ã ¤ç ç ¶ã ®çµ é 㠨幼å æ ã «è© å® ã ã ã ã ã ©ã ã ®æ ç ã ®å® å® æ §ã æ æ¨ ã «ã ã ¦ã æ¯ è¦ªã ®ç¤¾ä¼ ç æ ¯æ ´ã ¨äººå £çµ±è¨ å­¦ç 㠪㠹㠯㠫㠤ã ã ¦é ©å ã ã ã ã å æ ã ¯ã çµ æ¸ ç ã «å¤ æ§ ã ªè æ ¯ã æ ã ¤182çµ ã ®ã ¢ã ã ªã «ç³»ã ¢ã ¡ã ªã «äººã ®æ¯ å­ ã ã é ã ã ã ã ç¸¦æ ­ç ã ªã 㠼㠿ã å ©ç ¨ã ã ã ç  ç©¶å å  è ã ¯å­ ã ©ã ã ®å ºç æ ã «é ã ã ã ã ç £å¾ 18ã æ é 追跡ã ã ã ã æ ¡ä»¶ä» ã æ½ å ¨æ é ·ã ¢ã ã «ã ®çµ æ ã ã ã æ é çµ é ã «ã ã æ¯ è¦ªã ®æ ã ã ¤ç ç ¶ã ¬ã ã «ã ®å¤ å ç ã ®å¢ å  ã ¯ã å¹¼å ã «æ ã ã ã ã æ ç ã ®å® å® æ §ã ã ã ¬ã ã £ã ã «äº æ¸¬ã ã ã ã ¨ã 示ã ã ã ã ã ã é« ã ç¤¾ä¼ æ ¯æ ´ã ¯ã æ é çµ é ã «ã ã æ¯ è¦ªã ®æ ã ã ¤ç ç ¶ã ¬ã ã «ã ®ä½ ä¸ ã «é ¢é £ã ã ã ã ã ã ®ä¸ æ ¹ã ã é« ã äººå £çµ±è¨ å­¦ç ã ªã ¹ã ¯ã ¯æ¯ è¦ªã ®æ ã ã ¤ç ç ¶ã ¬ã ã «ã ®å¢ å  ã ¨é ¢é £ã ã ã ã ã ã «ç¶ ã å¤ ç¾¤æ ¡ä»¶ä» ã æ½ å ¨æ é ·ã ¢ã ã «ã ã ã å­ ã ©ã ã ®æ §å ¥ã ã ã ã ã ®é ¢é £ã ç·©å ã ã ã ç ·å 㠧㠯 (ã ã ã 女å 㠧㠯㠪ã ) ã æ ¥é ã «å¢ å¤§ã ã æ¯ è¦ªã ®æ ã ã ¤ç ç ¶ã ¯ã 18ã æ ã §æ ã ã ã ã æ ç ã ®å® å® æ §ã ®ä½ ã ã ¨é ¢é £ã ã ã ã ã ã ã ®çµ æ ã ã ã 女å ã «æ¯ ã ¹ã ¦ç ·å ã ¯ã æ¯ è¦ªã ®æ ã 㠤㠮ã ã ã ªæ ©æ ã ®é¤ è ²ã ªã ¹ã ¯ã «å¯¾ã ã ¦ã ã è 弱㠧ã ã ã å¹¼å æ ã ®æ¯ å­ ã ®æ ç ã ®å® å® æ §ã «ã ã ¬ã ã £ã ã ªçµ æ ã ã ã ã ã ã ¦ã ã ã æ è¦ æ ¬ç  ç©¶ç ç ®ç æ ¯è© ä¼°å ç«¥ç §é¡§é¢¨é ªç è å¼±æ §æ ¯å ¦å­ å ¨æ §å ¥å·®ç °, ä½ è æ ¹æ ç ¢å¾ 2è ³18å æ ç ç ¢å©¦æ 鬱ç ç ç è» è·¡, å å ç«¥å ¨å¹¼å æ ç é¡ å® ä¾ é å® å ¨æ è© ä¼°, ä¸¦èª¿æ ´æ¯ è¦ªç 社æ æ ¯æ å äººå £é¢¨é ªã ç  ç©¶å æ ä½¿ç ¨å¾ 182å ä¾ è ªç¶ æ¿ å¤ æ¨£å è æ ¯ç ç¾ å é æ´²è£ æ¯ å­ äº äººçµ å ç 縱å æ ¸æ ã å è è å ¨å­©å­ å ºç æ æ å , ç ¶å¾ è· é ²å °ç ¢å¾ 18å æ ã æ¢ ä»¶æ½ å ¨ç é ·æ¨¡å ç çµ æ 表æ , é ¨è æ é ç æ ¨ç§», æ¯ è¦ªæ 鬱ç ç ç å¢ å  ç , è² é ¢å °é  æ¸¬å¹¼å ç ä¾ é å® å ¨æ ã è¼ é« ç 社æ æ ¯æ è æ¯ è¦ªæ 鬱ç ç ç é ä½ ç ¸é , è è¼ é« ç äººå £é¢¨é ªè æ¯ è¦ªæ 鬱ç ç ç å¢ å  ç ¸é ã é ¨å¾ ç å¤ çµ æ¢ ä»¶æ½ å ¨ç é ·æ¨¡å å æ 顯示, å ç«¥æ §å ¥ç·©å é é ä¿ ã å° æ ¼ç ·å­© (ä½ ä¸ æ ¯å¥³å­©) , æ¯ è¦ªæ 鬱ç ç ç å¿«é å¢ å  è 18å æ æ è¼ ä½ ç ä¾ é å® å ¨æ æ é ã é äº ç  ç©¶çµ æ 表æ , è å¥³å­©ç ¸æ¯ , ç ·å­©å ¯è ½æ ´å®¹æ å å °æ ©æ ç §é¡§é¢¨é ª, ä¾ å¦ ç ¢å©¦æ 鬱ç , å° å¹¼å æ æ¯ å­ ä¾ é å® å ¨æ å¸¶ä¾ ç è² é ¢å½±é ¿ãPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/135990/1/imhj21617.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/135990/2/imhj21617_am.pd

Patterns of Maternal Distress from Pregnancy Through Childhood Predict Psychopathology During Early Adolescence

Capitalizing on a longitudinal cohort followed from gestation through adolescence (201 mother–child dyads), we investigate the contributions of severity and stability of both maternal depressive and perceived stress symptoms to adolescent psychopathology. Maternal depressive and perceived stress trajectories from pregnancy through adolescence were identified with latent class growth analyses, and associations with adolescent internalizing and externalizing symptoms were examined. For both depression and stress, the most common trajectory group comprised mothers displaying stable and low symptom levels over time, and adolescents of these mothers had the fewest internalizing and externalizing symptoms. Maternal membership to one or more aberrant trajectory groups predicted higher levels of internalizing and externalizing symptoms, determined by both maternal and adolescent self-report. This study indicates that profiles of multiple indicators of maternal psychopathology assessed across childhood, beginning prenatally, can provide critical additional insight into child psychopathology risk

cAMP Response Element-Binding Protein Deficiency Allows for Increased Neurogenesis and a Rapid Onset of Antidepressant Response

cAMP response element-binding protein (CREB) has been implicated in the molecular and cellular mechanisms of chronic antidepressant (AD) treatment, although its role in the behavioral response is unclear. CREB-deficient (CREBαΔ mutant) mice demonstrate an antidepressant phenotype in the tail suspension test (TST) and forced-swim test. Here, we show that, at baseline, CREBαΔ mutant mice exhibited increased hippocampal cell proliferation and neurogenesis compared with wild-type (WT) controls, effects similar to those observed in WT mice after chronic desipramine (DMI) administration. Neurogenesis was not further augmented by chronic DMI treatment in CREBαΔ mutant mice. Serotonin depletion decreased neurogenesis in CREBαΔ mutant mice toWTlevels, which correlated with a reversal of the antidepressant phenotype in the TST. This effect was specific for the reversal of the antidepressant phenotype in these mice, because serotonin depletion did not alter a baseline anxiety-like behavior in CREB mutant mice. The response to chronic AD treatment in the novelty-induced hypophagia (NIH) test may rely on neurogenesis. Therefore, we used this paradigm to evaluate chronic AD treatment in CREB mutant mice to determine whether the increased neurogenesis in these mice alters their response in the NIH paradigm. Whereas both WT and CREBαΔ mutant mice responded to chronic AD treatment in the NIH paradigm, only CREBαΔ mutant mice responded to acute AD treatment. However, in the elevated zero maze, DMI did not reverse anxiety behavior in mutant mice. Together, these data show that increased hippocampal neurogenesis allows for an antidepressant phenotype as well as a rapid onset of behavioral responses to AD treatment

Maternal Prenatal Cortisol Programs the Infant Hypothalamic–Pituitary–Adrenal Axis

One of the key proposed agents of fetal programming is exposure to maternal glucocorticoids. Experimental animal studies provide evidence that prenatal exposure to elevated maternal glucocorticoids has consequences for hypothalamic–pituitary–adrenal (HPA) axis functioning in the offspring. There are very few direct tests of maternal glucocorticoids, such as cortisol, during human pregnancy and associations with infant cortisol reactivity. The current study examined the link between maternal prenatal cortisol trajectories and infant cortisol reactivity to the pain of inoculation in a sample of 152 mother-infant (47.4% girls) pairs. The results from the current study provide insight into fetal programming of the infant HPA axis, demonstrating that elevated prenatal maternal cortisol is associated with a larger infant cortisol response to challenge at both 6 and 12 months of age

Infant Hedonic/Anhedonic Processing Index (HAPI-Infant): Assessing Infant Anhedonia and Its Prospective Association with Adolescent Depressive Symptoms

Background Anhedonia, an impairment in the motivation for or experience of pleasure, is a well-established transdiagnostic harbinger and core symptom of mental illness. Given increasing recognition of early life origins of mental illness, we posit that anhedonia should, and could, be recognized earlier if appropriate tools were available. However, reliable diagnostic instruments prior to childhood do not currently exist. Methods We developed an assessment instrument for anhedonia/reward processing in infancy, the Infant Hedonic/Anhedonic Processing Index (HAPI-Infant). Exploratory factor and psychometric analyses were conducted using data from 6- and 12-month-old infants from two cohorts (N = 188, N = 212). Then, associations were assessed between infant anhedonia and adolescent self-report of depressive symptoms. Results The HAPI-Infant (47-items), exhibited excellent psychometric properties. Higher anhedonia scores at 6 (r = 0.23, p \u3c .01) and 12 months (r = 0.19, p \u3c .05) predicted elevated adolescent depressive symptoms, and these associations were stronger than for established infant risk indicators such as negative affectivity. Subsequent analyses supported the validity of short (27-item) and very short (12-item) versions of this measure. Limitations The primary limitations of this study are that the HAPI-Infant awaits additional tests of generalizability and of its ability to predict clinical diagnosis of depression. Conclusions The HAPI-Infant is a novel, psychometrically strong diagnostic tool suitable for recognizing anhedonia during the first year of life with strong predictive value for later depressive symptoms. In view of the emerging recognition of increasing prevalence of affective disorders in children and adolescents, the importance of the HAPI-Infant in diagnosing anhedonia is encouraging. Early recognition of anhedonia could target high-risk individuals for intervention and perhaps prevention of mental health disorders

Mid-to-Late M Dwarfs Lack Jupiter Analogs

Cold Jovian planets play an important role in sculpting the dynamical environment in which inner terrestrial planets form. The core accretion model predicts that giant planets cannot form around low-mass M dwarfs, although this idea has been challenged by recent planet discoveries. Here, we investigate the occurrence rate of giant planets around low-mass (0.1-0.3M$_\odot$) M dwarfs. We monitor a volume-complete, inactive sample of 200 such stars located within 15 parsecs, collecting four high-resolution spectra of each M dwarf over six years and performing intensive follow-up monitoring of two candidate radial-velocity variables. We use TRES on the 1.5 m telescope at the Fred Lawrence Whipple Observatory and CHIRON on the Cerro Tololo Inter-American Observatory 1.5 m telescope for our primary campaign, and MAROON-X on Gemini North for high-precision follow-up. We place a 95%-confidence upper limit of 1.5% (68%-confidence limit of 0.57%) on the occurrence of $M_{\rm P}$sin$i >$1M$_{\rm J}$ giant planets out to the water snow line and provide additional constraints on the giant planet population as a function of $M_{\rm P}$sin$i$ and period. Beyond the snow line ($100$ K $< T_{\rm eq} < 150$ K), we place 95%-confidence upper limits of 1.5%, 1.7%, and 4.4% (68%-confidence limits of 0.58%, 0.66%, and 1.7%) for 3M$_{\rm J} < M_{\rm P}$sin$i < 10$M$_{\rm J}$, 0.8M$_{\rm J} < M_{\rm P}$sin$i < 3$M$_{\rm J}$, and 0.3M$_{\rm J} < M_{\rm P}$sin$i < 0.8$M$_{\rm J}$ giant planets; i.e., Jupiter analogs are rare around low-mass M dwarfs. In contrast, surveys of Sun-like stars have found that their giant planets are most common at these Jupiter-like instellations.Comment: Accepted for publication in AJ; 19 pages, 5 figures, 2 table

Professional Standards for School-Based Behavior Analysts

The Professional Standards for School-Based Behavior Analysts are intended to serve as an enhanced foundational layer for behavior analysts working specifically in the context of public school settings. These Professional Standards were developed by a team of behavior analysts with experience working in public schools and feedback was obtained from additional behavior analysts and other education professionals. There are five identified Professional Standard areas including: 1) Ethical & Professional Practice; 2) Collaboration; 3) Systems Capacity Building; 4) Instruction; and 5) Leadership & Policy

External validation of a machine learning algorithm to distinguish death from disenrollment in claims data

Poster presentation from the 38th International Conference on Pharmacoepidemiology & Therapeutic Risk Managemen