title: An entropy gain measure of numeric prediction performance

authors: Trigg, Leonard E.

subjects: computer science

abstract: Categorical classifier performance is typically evaluated with respect to error rate, expressed as a percentage of test instances that were not correctly classified. When a classifier produces multiple classifications for a test instance, the prediction is counted as incorrect (even if the correct class was one of the predictions). Although commonly used in the literature, error rate is a coarse measure of classifier performance, as it is based only on a single prediction offered for a test instance. Since many classifiers can produce a class distribution as a prediction, we should use this to provide a better measure of how much information the classifier is extracting from the domain. 
Numeric classifiers are a relatively new development in machine learning, and as such there is no single performance measure that has become standard. Typically these machine learning schemes predict a single real number for each test instance, and the error between the predicted and actual value is used to calculate a myriad of performance measures such as correlation coefficient, root mean squared error, mean absolute error, relative absolute error, and root relative squared error. With so many performance measures it is difficult to establish an overall performance evaluation.
The next section describes a performance measure for machine learning schemes that attempts to overcome the problems with current measures. In addition, the same evaluation measure is used for categorical and numeric classifier.

text: An entropy gain measure of numeric prediction performance Categorical classifier performance is typically evaluated with respect to error rate, expressed as a percentage of test instances that were not correctly classified. When a classifier produces multiple classifications for a test instance, the prediction is counted as incorrect (even if the correct class was one of the predictions). Although commonly used in the literature, error rate is a coarse measure of classifier performance, as it is based only on a single prediction offered for a test instance. Since many classifiers can produce a class distribution as a prediction, we should use this to provide a better measure of how much information the classifier is extracting from the domain. 
Numeric classifiers are a relatively new development in machine learning, and as such there is no single performance measure that has become standard. Typically these machine learning schemes predict a single real number for each test instance, and the error between the predicted and actual value is used to calculate a myriad of performance measures such as correlation coefficient, root mean squared error, mean absolute error, relative absolute error, and root relative squared error. With so many performance measures it is difficult to establish an overall performance evaluation.
The next section describes a performance measure for machine learning schemes that attempts to overcome the problems with current measures. In addition, the same evaluation measure is used for categorical and numeric classifier.

year: 1998-05

title: Music video's performing bodies: Floria Sigismondi as gestural animator and puppeteer

authors: Perrott, Lisa

subjects: Arts & Humanities

abstract: Auteur music video director Floria Sigismondi has a reputation for creating beautifully macabre imagery that has been described as surreal and uncanny. Less obvious is the way in which she uses animation and gesture to estrange the movement of performing bodies. While pixilation and stop motion animation are used together to invert the agency of humans and objects, Sigismondi’s use of gesture extends this manipulation of agency beyond technical processes. This dialectic of cinematic agency is discussed through an examination of three music videos directed by Sigismondi: End of the World (2004) for The Cure, Montauk Fling (2013) for Lawrence Rothman and The Stars (Are Out Tonight) (2013) for David Bowie. Considering these videos in relation to puppet animation, live-action film and the cultural and historical migration of gesture, the author argues that Sigismondi puppetises humans and animates gesture as a means of transgression.

text: Music video's performing bodies: Floria Sigismondi as gestural animator and puppeteer Auteur music video director Floria Sigismondi has a reputation for creating beautifully macabre imagery that has been described as surreal and uncanny. Less obvious is the way in which she uses animation and gesture to estrange the movement of performing bodies. While pixilation and stop motion animation are used together to invert the agency of humans and objects, Sigismondi’s use of gesture extends this manipulation of agency beyond technical processes. This dialectic of cinematic agency is discussed through an examination of three music videos directed by Sigismondi: End of the World (2004) for The Cure, Montauk Fling (2013) for Lawrence Rothman and The Stars (Are Out Tonight) (2013) for David Bowie. Considering these videos in relation to puppet animation, live-action film and the cultural and historical migration of gesture, the author argues that Sigismondi puppetises humans and animates gesture as a means of transgression.

year: 2015

title: The challenges of culture to psychology and post-modern thinking

authors: Waldegrave, Charles

subjects: Maori

abstract: Someone at a workshop in the Waikato once said to us, “You know a Maori, if they want to, can always learn to be a psychologist, but a psychologist can’t learn to be a Maori”. Cultural knowledge may or may not be accompanied by social science knowledge. Cultural knowledge can stand on its own. Those who possess it, and choose to work in the institutions we are associated with, have gifts this country desperately needs. All our organisations require such people, and they need to be properly resourced, have employment security and control over their work. Their own work away from our organisations also requires adequate resourcing. They can heal their own in ways that we will never be able to. They will almost certainly offer the field rich alternative metaphors and meanings that can free us from the tired old medical, biological and social science ones. This also has implications for those in other branches of psychology, including research, experimental and industrial psychology. There is perhaps a unique opportunity for psychologists in this country of Aotearoa/New Zealand to recognise other ways of describing events, which will lead to creative practices and enable the health and welfare resources to get to those who most need them, on their own terms. It would also enable other people, other workers from other cultures to develop new paradigms, and new shifts in our field. This will not lead to the abandonment of social science, but it will enable that body of knowledge, to sit appropriately along side other realms of knowledge such as gender knowledge, and cultural knowledge, without dominating. A new experience for the social scientists, but I suspect a liberating one!

text: The challenges of culture to psychology and post-modern thinking Someone at a workshop in the Waikato once said to us, “You know a Maori, if they want to, can always learn to be a psychologist, but a psychologist can’t learn to be a Maori”. Cultural knowledge may or may not be accompanied by social science knowledge. Cultural knowledge can stand on its own. Those who possess it, and choose to work in the institutions we are associated with, have gifts this country desperately needs. All our organisations require such people, and they need to be properly resourced, have employment security and control over their work. Their own work away from our organisations also requires adequate resourcing. They can heal their own in ways that we will never be able to. They will almost certainly offer the field rich alternative metaphors and meanings that can free us from the tired old medical, biological and social science ones. This also has implications for those in other branches of psychology, including research, experimental and industrial psychology. There is perhaps a unique opportunity for psychologists in this country of Aotearoa/New Zealand to recognise other ways of describing events, which will lead to creative practices and enable the health and welfare resources to get to those who most need them, on their own terms. It would also enable other people, other workers from other cultures to develop new paradigms, and new shifts in our field. This will not lead to the abandonment of social science, but it will enable that body of knowledge, to sit appropriately along side other realms of knowledge such as gender knowledge, and cultural knowledge, without dominating. A new experience for the social scientists, but I suspect a liberating one!

year: 1993