ADHD research papers samples free
accident investigation essay
Accordingly, forensics inquiries in various disciplines are indispensable ingredients in aviation accident investigation. However, human factors analyses are often inductive in nature and are hampered by loss of evidence, whether by death of those involved, by memory losses of those injured, by deliberately ambiguous statements, or even by rationalizing or intentional misstatements. Nonetheless, forensic human factors in aviation legitimately takes its place as a method for integrating remaining evidence, specific facts, and circumstances to determine what, and more importantly, why human factors is more often than not the primary cause of an accident. Ideally, such analyses focus specifically on the objective of how to make systems/people operate safely and efficiently together in future designs, procedures, and training.
accident investigation term paper
In some cases accident investigation, especially public investigations, is an institutionalized way of handling social and political concern about accidents. Some regard this as a means of protecting organizational interests: Both a manifest and a latent function of regulatory agencies when an accident does occur is to assure us that we shall find out why it happened and to assure us that it will not happen again. Manifestly, they should investigate to search for a causal explanation of the accident (a seeming contradiction) or conduct research on harms that gain operating intelligence for those who may be thought responsible for the harm.
Essay On Accident And Emergency
Accidents, especially disasters, draw the work of the regulatory agency to the public notice. Its activities become subject to outside scrutiny and judgement and it may feel under pressure, especially from the media, to seek out personal culprits for what has gone wrong. In such a climate accidents may be interpreted as moral and blameworthy, rather than neutral and technical. The dangers of blaming individuals for an organizational or systems failure are significant, not least because this can mitigate against the wider lessons of an accident investigation being drawn and exploited. Undoubtedly the costs and benefits of each case vary and in some instances a more considered approach to accidents is to be advocated.
acid rain essay
Finally, what is known about the nature, causes, and effects of acid rain is sufficient to design effective abatement programs. It is clear that sulphur is causing damage in aquatic and terrestrial systems, materials, and perhaps human health. Canadian studies have shown that reducing sulphur dioxide emissions will result in a proportional reduction in sulphur loading over large areas. One thirteen-year study found that total sulphur dioxide emissions from sources within 1,000 miles of southern Nova Scotia decreased by 25% over the period between 1971 and 1983. Sulphate deposition in the area decreased by almost onehalf, and many of the lakes and streams are showing chemical recovery.
add/adhd term papers
Abikoff, Gittleman-Klein, and Klein were among the first to develop a direct observational code, specifically for measuring ADHD symptoms in the classroom. Fourteen categories reflecting ADHD behaviors (e.g., off-task, movement about the classroom) are scored on an interval basis. Twelve of these 14 codes were found to differentiate ADHD and normal children. The Hyperactive Behavior Code was also developed to assess ADHD symptoms in the classroom. Six behavior codes constituting ADHD-like symptoms (e.g., change of position, daydreaming) are recorded on an interval system and collapsed to yield a single summary score. The summary score discriminates ADHD from normal children in structured classroom situations and correlates highly with teacher ratings of ADHD behaviors on the CTRS.
Adhd And Gifted Children Research Papers
These findings, although based on a small sample at this stage, have some implications for how ADHD is conceived and assessed clinically. If we were to ignore the context of behavior, or the severity of its manifestation, or concentrate only on the "milder" symptom of fidgetiness, we would expect a prevalence of about 10% for ADHD. On the other hand, if we were to require that the abnormal behavior be expressed severely in a series of activities (e.g., running about, inability to sit still, etc.) across a variety of contexts apart from activities imposed by others, we would obtain a reduced prevalence (2.4% according to our small-sample estimate).
adhd informative paper
The ADHD data on twins provided a unique opportunity to develop new ways of looking at critical genetic issues that rescued us from deciding too early between the categorical and dimensional approaches. In the first stage of the analysis summarized earlier, twins were treated as individuals. Therefore, the results we obtained turned out to be exactly what we would obtain if we analyzed the twins as pairs but assumed that pair members were not associated for class membership. We therefore had to determine whether twins would be correlated for class membership and, if they were, to begin to examine why.
Adhd Paper Research
The effects of the environment cannot be relegated to chance vagaries of individual symptomatology but have to be taken seriously as part of the ontogenetic process intervening between the genotype and its expression in the major phenotypic classes emerging from this analysis. Second, when we compared the single-gene/complete penetrance model with all of the others, we found that the proportion of MZ pairs in the middle (fidgety) class of putative heterozygotes under the Mendelian model was far higher (20.15%) than was estimated, which allows for genetic and environmental effects on class membership. Briefly stated, if there is a major gene increasing the risk for ADHD, it is surely not fully penetrant. Rather, the environment causes considerable "scrambling" between the latent genotypic classes and the manifest categories of behavior.
adhd thesis
ADHD is one of the most common causes of referral of children to mental health care in the United States. The great variation in the degree of symptoms and pervasiveness across situations suggests a great deal of heterogeneity in the disorder at the phenotypic level. The goal of our genetic analysis was to help resolve some of this heterogeneity by grounding clinical distinctions at the phenotypic level in identifiable etiological differences at the genetic and environmental levels. The backbone of the assessment of ADHD in this analysis was the detailed semistructured home interview using the Parental form of the Child and Adolescent Psychiatric Assessment (P-CAPA), which was developed for epidemiological study by Rutter and his colleagues.
free research paper on adhd
Our analysis suggests that elements of both dimensional and categorical models may be necessary for a full understanding of some forms of psychopathology. We see that even if there were a single gene of large effect contributing to the risk for ADHD, there is evidence of a dimensional ordering of severity of symptomatology at the phenotypic level. Furthermore, even when one assumes that there is such a gene, the pattern of penetrances is consistent with a dimensional model for the expression of that locus. That is, the AA genotype is the most likely to produce the asymptomatic phenotype and the least likely to produce the most severe phenotype.