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Full-Text Articles in Social and Behavioral Sciences

Neurologists Look At Causes Of Baffling Brain Condition, Maggie Freleng Dec 2015

Neurologists Look At Causes Of Baffling Brain Condition, Maggie Freleng

Capstones

It can be hard getting help for someone with mental illness, but almost impossible when that person doesn't think they are sick. At at least half of people with schizophrenia, for example, insist that the voices they hear are real. People who do not know they are ill often refuse therapy and medication -- and their symptoms can spiral out of control. Doctors call this lack of awareness anosognosia. Neurologists are trying to discover what causes this baffling condition--and how to treat it.


How Can We Build A Moral Robot?, Kristen E. Clark Dec 2015

How Can We Build A Moral Robot?, Kristen E. Clark

Capstones

Artificial intelligence is already starting to drive our cars and make choices that affect the world economy. One day soon, we’ll have robots that can take care of our sick and elderly, and even rescue us in rescue us in emergencies. But as robots start to make decisions that matter—it’s raising questions that go far beyond engineering. We’re stating to think about ethics.

Bertram Malle and Matthias Scheutz are part of a team funded by the department of defense. It's their job to answer a question that seems straight out of a sci-fi novel: How can we build a moral …


You're Only As Good As You Do In School: Asian American Students And The Mental Risks They Face In Higher Education, Asia C. Ewart Dec 2015

You're Only As Good As You Do In School: Asian American Students And The Mental Risks They Face In Higher Education, Asia C. Ewart

Capstones

Anne Cai always joked that, “one of these days,” school was going to drive her to insanity. A snapshot of her life begged to differ. As the oldest of three daughters in her traditional Chinese­ American family, Anne, 23, was the image of success and achievement, not only for her parents and their peers, but for her sisters Jenny, 19, and Vicky, 13. She excelled in elementary, middle and at all three of her high schools—the high school moves were decided by her parents and she never questioned them, lest she burden the family with what she considered complaining.


Training A New Trick Using No-Reward Markers: Effects On Dogs’ Performance And Stress Behaviors, Naomi Rotenberg Dec 2015

Training A New Trick Using No-Reward Markers: Effects On Dogs’ Performance And Stress Behaviors, Naomi Rotenberg

Theses and Dissertations

This study explored using no-reward markers (NRMs). Dogs were taught a novel trick. In the IG group dogs’ errors were ignored; in the NRM group they elicited a tone. Performance and stress were evaluated. IG dogs reached higher levels of performance, with no difference in the frequency of stress behaviors.


Increases In Perspective Embedding Increase Reading Time Even With Typical Text Presentation: Implications For The Reading Of Literature, D. H. Whalen, Lisa Zunshine, Michael Holquist Nov 2015

Increases In Perspective Embedding Increase Reading Time Even With Typical Text Presentation: Implications For The Reading Of Literature, D. H. Whalen, Lisa Zunshine, Michael Holquist

Publications and Research

Reading fiction is a major component of intellectual life, yet it has proven difficult to study experimentally. One aspect of literature that has recently come to light is perspective embedding (“she thought I left” embedding her perspective on “I left”), which seems to be a defining feature of fiction. Previous work (Whalen et al., 2012) has shown that increasing levels of embedment affects the time that it takes readers to read and understand short vignettes in a moving window paradigm. With increasing levels of embedment from 1 to 5, reading times in a moving window paradigm rose almost linearly. However, …


Word-Length Correlations And Memory In Large Texts: A Visibility Network Analysis, Lev Guzmán-Vargas, Bibiana Obregón-Quintana, Daniel Aguilar-Velázquez, Ricardo Hernández-Pérez, Larry S. Liebovitch Nov 2015

Word-Length Correlations And Memory In Large Texts: A Visibility Network Analysis, Lev Guzmán-Vargas, Bibiana Obregón-Quintana, Daniel Aguilar-Velázquez, Ricardo Hernández-Pérez, Larry S. Liebovitch

Publications and Research

We study the correlation properties of word lengths in large texts from 30 ebooks in the English language from the Gutenberg Project (www.gutenberg.org) using the natural visibility graph method (NVG). NVG converts a time series into a graph and then analyzes its graph properties. First, the original sequence of words is transformed into a sequence of values containing the length of each word, and then, it is integrated. Next, we apply the NVG to the integrated word-length series and construct the network. We show that the degree distribution of that network follows a power law, P(k)∼k−γP(k)∼k-γ, with two regimes, which …


Daily Minority Stress And Affect Among Gay And Bisexual Men: A 30-Day Diary Study, Adam I. Eldahan, John E. Pachankis, H. Jonathan Rendina, Ana Ventuneac, Christian Grov, Jeffrey T. Parsons Oct 2015

Daily Minority Stress And Affect Among Gay And Bisexual Men: A 30-Day Diary Study, Adam I. Eldahan, John E. Pachankis, H. Jonathan Rendina, Ana Ventuneac, Christian Grov, Jeffrey T. Parsons

Publications and Research

Background. This study examined the time-variant association between daily minority stress and daily affect among gay and bisexual men. Tests of time-lagged associations allow for a stronger causal examination of minority stress-affect associations compared with static assessments. Multilevel modeling allows for comparison of associations between minority stress and daily affect when minority stress is modeled as a between-person factor and a within-person time-fluctuating state.

Methods. 371 gay and bisexual men in New York City completed a 30-day daily diary, recording daily experiences of minority stress and positive affect (PA), negative affect (NA), and anxious affect (AA). Multilevel analyses examined …


A Cognitive-Based Indicator Of Deviant Sexual Arousal: Concurrent Validation Of The Emotional Stroop, Ashley H. Spada Sep 2015

A Cognitive-Based Indicator Of Deviant Sexual Arousal: Concurrent Validation Of The Emotional Stroop, Ashley H. Spada

Dissertations, Theses, and Capstone Projects

One of the strongest dynamic predictors of sexual recidivism among sex offenders is deviant sexual arousal (DSA; Hanson & Bussiére, 1998). Phallometric testing, the most commonly used method of assessing DSA, has elicited numerous methodological, ethical, and financial criticisms, while self-report measures are vulnerable to social desirability and lack of self-awareness. In an effort to overcome the limitations of previous measures of DSA, researchers have employed cognitive measures including a modified version of the Stroop task to measure DSA among sexual offenders (Price & Hanson, 2007; Smith & Waterman, 2004). These original studies used victim selection to assess the concurrent …


Parentification And Separation-Individuation In Siblings Of Individuals With A Chronic Illness Or Disability, Danielle Benveniste Stevens Sep 2015

Parentification And Separation-Individuation In Siblings Of Individuals With A Chronic Illness Or Disability, Danielle Benveniste Stevens

Dissertations, Theses, and Capstone Projects

Well siblings of children with an illness or disability constitute a population of growing interest in psychological research. Past research suggests that these individuals may be likely to adopt increased caretaking responsibilities, or a parentified role, within the family. However, to date, few studies have examined the experiences of well siblings as they relate to late adolescent development. This study extends the well sibling research to the period of emerging adulthood and examines the degree to which 18 to 25 year-old well sibling and control groups report different levels of parentification and endorse different patterns of adolescent separation-individuation. In addition, …


Policy Implications Of A Predictive Validity Study Of The Specialized High School Admissions Test At Three Elite New York City High Schools, Jonathan James Taylor Sep 2015

Policy Implications Of A Predictive Validity Study Of The Specialized High School Admissions Test At Three Elite New York City High Schools, Jonathan James Taylor

Dissertations, Theses, and Capstone Projects

Although admission to New York City's elite public high schools has been controversial because of the disproportionate representation by ethnicity and gender of students admitted, there has been no research on the Specialized High School Admissions Test (SHSAT), the sole admissions criterion. This dissertation had four primary questions: (1) What is the predictive validity of the SHSAT? (2) Would the use of NYC achievement test scores improve prediction? (3) Does the SHSAT exhibit equal predictive validity across gender? and (4) Do disadvantaged students admitted to the Discovery Program with test scores below the cutoff earn grades comparable to regularly admitted …


Senescent Changes In Orientation, Frequency, And 3-D Slant And Shape Perception, Danny Tam Sep 2015

Senescent Changes In Orientation, Frequency, And 3-D Slant And Shape Perception, Danny Tam

Dissertations, Theses, and Capstone Projects

The ability to perceive the 3-Dimensional world is effortless despite the fact that the input to the visual system is 2-Dimensional. Attempts to derive biologically plausible models of shape from texture have focused on how changes in orientation and spatial frequency information are processed based on the response properties of primary visual cortex (V1) neurons. However, the relative contributions of orientation and spatial frequency information in detecting slant and shape from 3-D surfaces are not well understood. Additionally, in senescence, changes in optical components of the eye result in reduced frequency sensitivity, but whether concurrent neurophysiological changes affect the ability …


Chinese-American Young Adult Children's Perception Of Parental Psychological And Behavioral Control And Its Impact On Their Emotional And Social Well-Being, Wan-Hai Tseng Sep 2015

Chinese-American Young Adult Children's Perception Of Parental Psychological And Behavioral Control And Its Impact On Their Emotional And Social Well-Being, Wan-Hai Tseng

Dissertations, Theses, and Capstone Projects

The primary aim of this qualitative study was to describe the ways in which Chinese-American young adult children perceive their parent(s) and/or primary caregiver(s)' expressions of psychological and behavioral control. It also explored how they believed these types of control affected their emotional and social well-being over time. Given that it is documented that their parents are demanding, and that this may be the reason their mental health outcomes are poorer than non-Asians, this exploration was needed. This research sought to provide a better understanding of the emotional and social development of Chinese-American young adult children as it relates to …


The Effect Of Retention Interval On Temporal Control Of Responding In Rats On The Peak Interval Procedure, Catherine Tsiris Sep 2015

The Effect Of Retention Interval On Temporal Control Of Responding In Rats On The Peak Interval Procedure, Catherine Tsiris

Dissertations, Theses, and Capstone Projects

A considerable body of literature on time perception has investigated the effects of short intratrial retention intervals (RI) in the seconds range, on temporal performance, however there is a dearth of research examining the effects of long, intersession RIs (hours to days range) on timing. The present study examined the effect of two different RI durations (2 days and 70 days) on time estimates in subjects on the peak interval procedure. Twenty-four rats, eight per group, were exposed to one of three conditions. The experimental group was trained at 5 months and tested after a 70-day RI. One control group …


Working Memory Deficits And Emotion Dysregulation In Youth With Attention-Deficit/Hyperactivity Disorder: Understanding Relationships And Treatment Implications, Jodi Zehava Uderman Sep 2015

Working Memory Deficits And Emotion Dysregulation In Youth With Attention-Deficit/Hyperactivity Disorder: Understanding Relationships And Treatment Implications, Jodi Zehava Uderman

Dissertations, Theses, and Capstone Projects

Evidence suggests that working memory (WM) impairment is a primary deficit in attention-deficit/hyperactivity disorder (ADHD), underlying core symptoms of the disorder and associated impairments. However, the relationship between deficits in different WM components and emotional problems specifically in ADHD has not yet been studied. Knowledge of the cognitive substrates contributing to emotional deficits in ADHD could inform efforts toward refining cognitive remediation as a treatment for emotion dysregulation in this population.

The first aim of this study (Aim 1) investigated whether WM deficits, as a global construct, were related to and mediated the relationship between ADHD and emotion dysregulation. The …


Emotion Dysregulation: A Predictor For Cbt Treatment Outcomes In A Comorbid Ptsd And Sud Population, Jennifer Robin Wallach Sep 2015

Emotion Dysregulation: A Predictor For Cbt Treatment Outcomes In A Comorbid Ptsd And Sud Population, Jennifer Robin Wallach

Dissertations, Theses, and Capstone Projects

Trauma has been shown to disrupt self-regulatory processes; emotion regulation deficits have also been implicated in the initiation and maintenance of substance use disorders (SUDs). Treatments for these complex comorbid problems utilize a variety of approaches. However, to date, few studies have examined the effect of various available treatments on emotion dysregulation in this population. This study extends the research on emotion regulation among the population with comorbid posttraumatic stress disorder (PTSD) and SUD. This study is a secondary analysis of part of the data from a randomized clinical trial assessing the relative efficacy of two active treatment conditions for …


Tales Of Language Loss And Language Maintenance: Elicited Ancestral Language Use In Lazuri-Turkish And Turkish-German Caregiver-Child Dyads During Structured Play, Peri Ozlem Yuksel-Sokmen Sep 2015

Tales Of Language Loss And Language Maintenance: Elicited Ancestral Language Use In Lazuri-Turkish And Turkish-German Caregiver-Child Dyads During Structured Play, Peri Ozlem Yuksel-Sokmen

Dissertations, Theses, and Capstone Projects

In language contact situations parents who grew up acquiring their ancestral language (AL) often have to make choices about the fate of AL transmission by negotiating resources and beliefs about what is best for their children's future. Their language practices contribute to AL loss or maintenance, affecting developmental pathways for bilingualism. The situation faced by speakers of Lazuri -- a Grade 2, severely endangered South Caucasian language that is no longer used in child-directed speech illustrates a global phenomenon of rapid language loss within indigenous communities due to linguistic assimilation to a dominant language (DL). AL loss is associated with …


The Relationship Between Maternal Depression And Negative Outcomes In Children: Parenting Deficits' Impact On Children's Emotional Regulation And Behavioral Expression, Gabrielle Francesca Cione Sep 2015

The Relationship Between Maternal Depression And Negative Outcomes In Children: Parenting Deficits' Impact On Children's Emotional Regulation And Behavioral Expression, Gabrielle Francesca Cione

Dissertations, Theses, and Capstone Projects

The present study examined the relationships between maternal depression, parenting practices and children's emotional and behavioral expressions. The study was a secondary analysis of a previous cross-sectional and cross-generational study (Maternal aggression, self-regulation and adverse child outcomes, DA 08963) funded by the National Institute for Drug Abuse (NIDA) that examined the pathways between maternal impairments (crack/cocaine use disorder, general psychopathology, and self-regulation deficits), child-rearing deficits (parenting deficits, child neglect, child physical/ sexual abuse), and adverse child outcomes (substance abuse, aggressive/ delinquent behaviors, and child self-regulation deficits).

The population for the current study was chosen because children of depressed mothers in …


Wh-Question Processing In Children With Cochlear Implants, Zarabeth Waldman Deluca Sep 2015

Wh-Question Processing In Children With Cochlear Implants, Zarabeth Waldman Deluca

Dissertations, Theses, and Capstone Projects

Children with cochlear implants (CIs) have exhibited difficulty accurately answering and producing wh-questions. The syntactic construction of wh-questions include syntactic movement, whereby the wh-question phrase that replaces the subject or object noun is fronted to the beginning of the sentence. This leaves a syntactic gap at the subject or object's original location, to be filled by the listener during immediate language processing. One view is that this syntactic gap is resolved by retaining that filler concept in working memory (WM), until it can be reintegrated into the wh-question. However, the CI population is also notable for WM deficits, which may …


Art As Communication: Employing Gricean Principles Of Communication As A Model For Art Appreciation, Melissa June Dolese Sep 2015

Art As Communication: Employing Gricean Principles Of Communication As A Model For Art Appreciation, Melissa June Dolese

Dissertations, Theses, and Capstone Projects

Abstract

How and why artworks elicit varied preferences and judgments among different individuals remains a topic with many unresolved issues. For instance, individuals with little artistic experience tend to show little appreciation for abstract art, even though such works often show a highly skilled organization of visual elements. A key aspect of a positive aesthetic experience concerns the ability of viewers to construct meaning. I propose that viewers attempt to make meaning of artworks due to a sense that art is a communicative process. Here I attempt an application of one intentionalist model of communication, the Gricean framework, to visual …


Beauty Practices Among Latinas: The Impact Of Acculturation, Skin Color And Sex Roles, Angelica Flores Sep 2015

Beauty Practices Among Latinas: The Impact Of Acculturation, Skin Color And Sex Roles, Angelica Flores

Dissertations, Theses, and Capstone Projects

This study sought to explore if and how Latinas use of beauty products (cosmetics) was influenced by their degree of acculturation to U.S. American culture, their phenotype (skin color and facial features) and sex role orientation. While beauty practices are often regarded as trivial, they are important because they reflect women's internalization of societal values and speak to the importance placed on impression management. Although it can be easily observed that people go to great lengths to decorate their exteriors in order to manage others perceptions of them, very few studies look at variables that influence these behaviors. Also, while …


Maternal Substance Use Disorder, Difficult Temperament And Child Psychopathology: Examining A Biopsychosocial Model For The Intergenerational Transmission Of Vulnerability, Wendy Carolina Franco Sep 2015

Maternal Substance Use Disorder, Difficult Temperament And Child Psychopathology: Examining A Biopsychosocial Model For The Intergenerational Transmission Of Vulnerability, Wendy Carolina Franco

Dissertations, Theses, and Capstone Projects

Background: Substance abuse is a significant issue that affects the lives of adults and children in our society. Children of substance abusing parents are at greater risk for poor psychosocial adjustment and psychopathology. The present study drew on biopsychosocial and epigenetic approaches to study vulnerability and resilience in children. The aim was to advance the understanding of child psychopathology and of intergenerational effects of maternal substance use disorder (SUD) by examining the independent and combined contributions of risk factors for child psychopathology in children of mothers with SUD. Employing a "goodness of fit model," which posits that adverse child outcomes …


Three Potential Mediators Of The Effects Of Child Abuse And Neglect On Smoking In Middle Adulthood, Miriam Ghirmay Sep 2015

Three Potential Mediators Of The Effects Of Child Abuse And Neglect On Smoking In Middle Adulthood, Miriam Ghirmay

Dissertations, Theses, and Capstone Projects

The purpose of the current study was fourfold: (1) to determine whether individuals with histories of child abuse and neglect have higher rates of current cigarette smoking in middle adulthood compared with matched controls; (2) to examine whether individuals with histories of abuse and/or neglect are at increased risk for higher rates of current psychopathology (anxiety or depression), negative coping, and past year traumas and victimization experiences in adulthood compared with matched controls; (3) to determine whether current psychopathology, negative coping, and past year traumas and victimization experiences mediate the relationship between child maltreatment and current smoking; and (4) to …


The Immigration Experience Among Elderly Egyptian Immigrants In The United States, Ihab Girgis Sep 2015

The Immigration Experience Among Elderly Egyptian Immigrants In The United States, Ihab Girgis

Dissertations, Theses, and Capstone Projects

An increasing mosaic of immigrants comes to the United States' shores every year for different reasons. An invisible part of those immigrants are the elderly who join their families in the United States. The story of the Egyptian elderly immigrants among them, as one representative group of Arabs, is significant and its investigation is timely. This study explores the context of exit from Egypt, the risk factors for health and mental health distress induced by this transition and how they impede the adjustment process, and the protective factors and processes that buffer the risk factors, foster resilience, and facilitate the …


Variability, Stability, And Flexibility In The Speech Kinematics And Acoustics Of Adults Who Do And Do Not Stutter, Eric S. Jackson Sep 2015

Variability, Stability, And Flexibility In The Speech Kinematics And Acoustics Of Adults Who Do And Do Not Stutter, Eric S. Jackson

Dissertations, Theses, and Capstone Projects

It is well known that people who do and do not stutter produce speech differently, at least some of the time, even when perceived as fluent. One way that investigators have assessed these differences is by measuring variability, or the inconsistency of repeated speech movements. Variability in speech has typically been quantified using linear analysis techniques (e.g., measures of central tendency), and results have indicated that people who stutter produce speech that is (sometimes) characterized by increased variability. However, variability is a complex phenomenon, one that cannot be assessed by linear methods alone. This dissertation employs linear and nonlinear analysis …


Sex-Dependent Role Of Interleukin-1 Signaling In Emotional And Cognitive Behaviors In Mice: Phenotyping Male And Female Il1-R1 Null Mutant Mice, Jennifer Anne Johnson Sep 2015

Sex-Dependent Role Of Interleukin-1 Signaling In Emotional And Cognitive Behaviors In Mice: Phenotyping Male And Female Il1-R1 Null Mutant Mice, Jennifer Anne Johnson

Dissertations, Theses, and Capstone Projects

IL1-R1 null mutant mice (IL1-R1 KO) have reduced signaling in the interleukin-1 (IL-1) pathway, making them a convenient model for testing the importance of IL-1 in either the development or maintenance of mouse behaviors. Prior research has revealed impaired cognitive and emotional processes in adult male IL1-R1 KO mice, including impaired spatial learning and memory and decreased anxiety with associated impairments in hippocampal cell proliferation and signal transmission. The current studies explored the neuroanatomy and behavioral phenotype of both male and female IL1-R1 KO mice. An array of behavioral tests was administered, including retesting at an older age for cognitive …


Deception As Forgery: The Role Of Reference Information In Honesty And Deceit, Timothy John Luke Sep 2015

Deception As Forgery: The Role Of Reference Information In Honesty And Deceit, Timothy John Luke

Dissertations, Theses, and Capstone Projects

Using concepts derived from cybernetics, self-presentation theory, and research on human self-regulation, I develop a cybernetic perspective of deception and self-presentation. In this perspective, human communication, both honest and deceptive, is controlled by feedback mechanisms. I report two studies designed to test the basic prediction derived from the cybernetic framework that deceivers are able to better emulate truth-tellers when they have access to relevant reference information about the way truth-tellers behave. Each study manipulated liars' and truth-tellers' access to reference information in a different manner. In Study 1, some participants viewed video recordings of people being interviewed in a manner …


The Influence Of A Child's Learning Disability On A Parent's Psychological Experience: A Comparison Of Parents With And Without Learning Disabilities, Alice Varley Mangan Sep 2015

The Influence Of A Child's Learning Disability On A Parent's Psychological Experience: A Comparison Of Parents With And Without Learning Disabilities, Alice Varley Mangan

Dissertations, Theses, and Capstone Projects

This dissertation examined the psychological experience of parents whose children have been diagnosed with moderate to severe learning disabilities (LD) and compared the impact of a child's learning disability across two groups of parents: one with LD and one without LD. In-depth semi-structured interviews were administered to eleven parents of children with LD, four of whom had LD themselves, and seven of whom did not have LD. Three levels of qualitative data analysis were employed to code the interviews resulting in four theoretical constructs: (1) Diagnosis as a Threat to Parental Narcissism; (2) Parents Engage Containing and Stabilizing Strategies; (3) …


Rethinking Internal Working Models From A Developmental Perspective: Clarifying The Concept And Making A Case For A Sensitive Period Of Attachment, Leah Bothe Manning Sep 2015

Rethinking Internal Working Models From A Developmental Perspective: Clarifying The Concept And Making A Case For A Sensitive Period Of Attachment, Leah Bothe Manning

Dissertations, Theses, and Capstone Projects

Chapter 1 attempts to clarify the internal working model (IWM) by offering a revised and more precise definition of the concept. Chapter 2 discusses the existing IWM research and asserts what aims should be applied to future research to further clarify the IWM concept. Chapters 3 and 4 describe the current three studies that sought to test the validity of the proposed IWM definition by determining if: (1) attachment status during the first three years fluctuates as a function of changes in maternal sensitivity, (2) IWM status in middle childhood and adolescence remains stable independent of changes in maternal sensitivity, …


Maternal Dissociation, Emotional Acceptance And Child Emotion Regulation: A Study Of Residents In A Family Homeless Shelter For Victims Of Domestic Violence, Brian S. Mueller Sep 2015

Maternal Dissociation, Emotional Acceptance And Child Emotion Regulation: A Study Of Residents In A Family Homeless Shelter For Victims Of Domestic Violence, Brian S. Mueller

Dissertations, Theses, and Capstone Projects

The present study examined the relationships between maternal dissociation, mothers' self-described parenting behaviors in child emotion regulation, and the emotion regulatory capacity of their children. These relationships were investigated in a sample of predominately low-income African-American and Latino mothers and children residing in a domestic violence shelter. In this study, I investigated a mediational model relating maternal dissociation, mother's acceptance of child emotions, and child difficulties in emotion regulation and behavior. I predicted that mothers who reported more dissociative experiences would demonstrate less awareness and acceptance of emotions when they responded to children's sadness, fear, happiness, and anger. I also …


Investigating The Effects Of Intervention Intensity On Skill Acquisition And Task Persistence In Children With Down Syndrome, Nicole Marie Neil Sep 2015

Investigating The Effects Of Intervention Intensity On Skill Acquisition And Task Persistence In Children With Down Syndrome, Nicole Marie Neil

Dissertations, Theses, and Capstone Projects

Maximizing outcomes for learners with Down syndrome requires an approach which is both effective and efficient. Modifying the intensity of intervention has the potential to affect the rate of skill acquisition as well as other learner behavior, such as task persistence, which alters the efficiency of intervention. The purpose of this study was to determine the effect of varying intensity levels of a behavior-analytic on acquisition and task persistence for young children with Down syndrome. Three children with Down syndrome were taught expressive language targets using three manipulations of intervention intensity (dose): the number of opportunities, the spacing of opportunities, …