Loneliness in individuals with intellectual disability

Although some substantial issues exist regarding measurement of loneliness in individuals with intellectual disability, research has generally concluded that members of this group are more likely to (1) appear to others to be lonelier than their typically developing peers and (2) self-report greater loneliness than typically-developing individuals. As examples, in a study by Solish, Perry, and Minnes (2010), parents of children with intellectual disability reported fewer friendships and social activities for their children than parents of typically-developing children. Oates, Bebbington, Bourke, Girdler, and Leonard (2011) found that approximately one-third of the parents in their population study of children with Down syndrome reported that their child had no friends. When questioned directly about the experience of loneliness, only boys with mild intellectual disability reported more loneliness than their same age, typically-developing peers (Williams & Asher, 1992).

Comparison of decision tree, support vector machines, and Bayesian network approaches for classification of falls in Parkinson’s disease

Being able to accurately predict the risk of falling is crucial in patients with Parkinson’s dis- ease (PD). This is due to the unfavorable effect of falls, which can lower the quality of life as well as directly impact on survival. Three methods considered for predicting falls are decision trees (DT), Bayesian networks (BN), and support vector machines (SVM). Data on a 1-year prospective study conducted at IHBI, Australia, for 51 people with PD are used. Data processing are conducted using rpart and e1071 packages in R for DT and SVM, con- secutively; and Bayes Server 5.5 for the BN. The results show that BN and SVM produce consistently higher accuracy over the 12 months evaluation time points (average sensitivity and specificity > 92%) than DT (average sensitivity 88%, average specificity 72%). DT is prone to imbalanced data so needs to adjust for the misclassification cost. However, DT provides a straightforward, interpretable result and thus is appealing for helping to identify important items related to falls and to generate fallers’ profiles.