TEL: (760) 387-2458

FAX: (760) 387-2459

Email: ralph@humanfactorsconsultants.com

Expertise: Consultation and expert testimony on eyewitness perception and identification; fingerprint science; memory; language; and human factors of safety and accidents. (1) Eyewitness accuracy: effects of conditions of observation, intervening events, police procedures, lineup identifications, and earlier testimony. (2) Fingerprint science: accuracy of fingerprint comparisons; evaluation of comparison methods and laboratory procedures; underlying scientific assumptions and evidence; training and proficiency of examiners. (3) Memory: accuracy of recall by adults and by children, including recovery of memory. (4) Language: children and adults' comprehension; verbal and non-verbal harassment; factors of verbal interviewing that may alter memory; assessment of language disabilities. (5) Human factors: product safety; analyses of transportation, industrial and residential accidents in which equipment failure, human reaction/decision time, training adequacy, attention, error and warning signage may be implemented. Together, we have 45 years courtroom experience, 70 years research, 12 books, 250 published scientific articles.