An apparatus for assessing the neurological state of a subject, comprising: an electrode set; a processor; a memory operatively coupled to the processor, wherein the memory stores one or more operating instructions and classification limits for categories comprising psychiatric, organic, and emergency condition; a multi-channel input-output interface operatively coupled to the processor, wherein the multi-channel input-output interface is configured to receive external electrical signals through the set of electrodes placed on the subject; and the processor is configured to utilize the one or more operating instructions to perform a series of operations on signals received from the multi-channel input-output interface wherein the a series of operations comprise: extracting desired features from the signals, applying discriminant analysis to the extracted features to classify of the extracted features into one or more categories, determining of the neurological state of the subject based on the classification wherein the step of determining the neurological state of the subject comprises: determining the probability of the neurological state being normal or abnormal, and characterized in that the step of determining the neurological state of the subject further comprises: if there is a higher probability of the neurological state being abnormal, further determining if the probability of the neurological state being within the classification limits stored in memory for psychiatric, organic, or emergency condition categories. an electrode set; a processor; a memory operatively coupled to the processor, wherein the memory stores one or more operating instructions and classification limits for categories comprising psychiatric, organic, and emergency condition; a multi-channel input-output interface operatively coupled to the processor, wherein the multi-channel input-output interface is configured to receive external electrical signals through the set of electrodes placed on the subject; and the processor is configured to utilize the one or more operating instructions to perform a series of operations on signals received from the multi-channel input-output interface wherein the a series of operations comprise: extracting desired features from the signals, applying discriminant analysis to the extracted features to classify of the extracted features into one or more categories, determining of the neurological state of the subject based on the classification wherein the step of determining the neurological state of the subject comprises: determining the probability of the neurological state being normal or abnormal, and characterized in that the step of determining the neurological state of the subject further comprises: if there is a higher probability of the neurological state being abnormal, further determining if the probability of the neurological state being within the classification limits stored in memory for psychiatric, organic, or emergency condition categories. the multi-channel input-output interface is configured to receive external electrical signals through the set of electrodes placed on the subject; and the processor is configured to utilize the one or more operating instructions to perform a series of operations on signals received from the multi-channel input-output interface wherein the a series of operations comprise: extracting desired features from the signals, applying discriminant analysis to the extracted features to classify of the extracted features into one or more categories, determining of the neurological state of the subject based on the classification extracting desired features from the signals, applying discriminant analysis to the extracted features to classify of the extracted features into one or more categories, determining of the neurological state of the subject based on the classification wherein the step of determining the neurological state of the subject comprises: determining the probability of the neurological state being normal or abnormal, and determining the probability of the neurological state being normal or abnormal, and characterized in that the step of determining the neurological state of the subject further comprises: if there is a higher probability of the neurological state being abnormal, further determining if the probability of the neurological state being within the classification limits stored in memory for psychiatric, organic, or emergency condition categories. if there is a higher probability of the neurological state being abnormal, further determining if the probability of the neurological state being within the classification limits stored in memory for psychiatric, organic, or emergency condition categories.