Presentation on theme: "Utilization of Artificial Neural Networks in the Prevention of Child Abuse By Jeffrey D. Jacob."— Presentation transcript:
Utilization of Artificial Neural Networks in the Prevention of Child Abuse By Jeffrey D. Jacob
What is an Artificial Neural Network? An artificial neural network is a computational model inspired by animal central nervous systems (in particular the brain) which is capable of machine learning and pattern recognition. It is usually presented as a system of interconnected "neurons" that can compute values from inputs by feeding information through the network. central nervous systems brainmachine learningpattern recognitionneurons Throughout this presentation, the term “Artificial Neural Network” refers to a feed- forward, multilayer perceptron type of neural network. “Feed forward” means that the values only move from input to hidden to output layers; no values are fed back to earlier layers.
How can an Artificial Neural Network help in the prediction and prevention of child abuse? This presentation is dependent upon the ASSUMPTION that: Child Abuse, in its varying degrees, is always a “deterministic output” which is always preceded by a common pattern of variables. This is true, even when the child abuse incident seems to be a “random” act. If this ASSUMPTION is true, then an Artificial Neural Network, which has proven to be an extremely useful method of accurately determining pattern recognition, could potentially be a powerful tool in recognizing the common patterns of variables that precede child abuse, and predict the potential for abuse with a high degree of accuracy.
Possible Roadmap For The Creation of a Neural Network That Can Predict Child Abuse
Development Life Cycle To Prototype: Months Theory Definition Define Theory of Child Abuse Prediction (TCAP) Live Data Acquisition Acquire real world data and reorient and redefine TCAP Outputs & Descriptors Define “Predicted Output Identifiers” and “Child abuse Descriptors/Inhibitors Train CAP-ABUSE-NET Use acquired data to assign synaptic weights and train data Test CAP-ABUSE-NET Acquire 2 nd data set to test and compare predicted results. Re- train if necessary. Development Life Cycle of CAP-ABUSE-NET The artificial neural network will be denoted as: Correlation-Analysis-Prediction of Abuse Network or CAP-ABUSE-NET
Funding of CAP-ABUSE-NET There will be no cost to the Los Angeles County Taxpayer! A 501(c)(3) non-profit entity, Creative Cyber Systems ( C2Systems ) will be formed. C2Systems will fund the project. C2Systems will offer a platform through which scientists, information technology experts, etc. can donate their knowledge and time to building CAP-ABUSE-NET All the science and technology will be open source, for any municipality to use at no charge The anticipated cost to the non-profit entity is projected to be under $750,000
MILESTONE 1: Define Theory of Child Abuse Prediction The available academic literature indicates that there are four main areas of abuse that can be categorized : PHYSICAL – SEXUAL – PSYCHOLOGICAL/EMOTIONAL – NEGLECT Within each category, there are varying degrees, which will need to be decomposed into the output neurons and labeled “Predicted Output Identifiers.” Because of the critical nature of this endeavor all pride, assumptions, prejudices, and bias must be sacrificed in favor of determining the Output neurons that most accurately represent the realities of child abuse!
MILESTONE 2: Live Data Acquisition Developers will reorient and redefine “Theory of Child Abuse Prediction” as necessary based on the acquired data using John Boyd’s Observation-Orientation-Decision-Action (OODA) Loop .
MILESTONE 3: Define Outputs & Descriptors The goal is to hire post- graduate college students for the summer. They will attend a 3 day training symposium that instructs the decomposition of WIC 300 petitions*, social worker reports*, social worker case notes*, dismissed WIC 300 petitions*, cases where “substantiated” allegations changed to “unfounded”* and other data* into definitive “Predicted Output Identifiers” (PRE-IDs) and further define Child Abuse Descriptors / Inhibitors (CHILD- ADs / CHILD-AIs) for each PRE-ID. Slides 8,9,10 that follow represent example PRE-IDs, CHILD-ADs, and CHILD-IDs extracted from the live data. *It is assumed that any identifying information as to child’s / parent’s name, address, will be removed before data provided.
MILESTONE 3: Define Outputs & Descriptors Cont’d Example : Predicted Output Identifier (PRE-IDs) Predicted Output Identifier Predicted Category Predicted Reporting Candidate PHYSICAL ABUSE P1DDeathSubstantiated P1SSevere injurySubstantiated P1JInjurySubstantiated P1PTemporal painSubstantiated P10No indication of abuseUnfounded PSYCH/EMOTIONAL ABUSE E1SSevere psych/emotional abuseSubstantiated E1JInjurious psych/emotional abuseSubstantiated E1PTemporal hurt feelingsSubstantiated E10No indication of Psych/emotional abuseUnfounded SEXUAL ABUSE S1PEvidence of sexual abuseSubstantiated S10No indication of sexual abuseUnfounded NEGLECT N1SSevere NeglectSubstantiated N1JGeneral NeglectSubstantiated N10No indication of neglectUnfounded
MILESTONE 3: Define Outputs & Descriptors Cont’d Example : Additional Child Abuse Descriptors (CHILD-ADs) Frequent Nightmares Frequent Referrals Unexplained Anger at PEREX Specific anger at PEREX Unexplained Crying Fits Alcohol, strange smell on child Animal abuse by PEREX Sleeping Area -prevalence of urination Hospitalization Suicide Attempt Suicide Verbalization Suicide Attempt Sibling Marks, Scars in Unlikely place(s) (behind ears, under armpits, on bottom of foot) Suicide Verbalization Sibling Bruises, Scars, Unexplained marks Evidence of Cutting Self Esteem PEREX Perception of Child Female Intuition CSW Intuition Fear PEREX Criminal Record Mental Health Issues (PEREX) person of exposure Academic Deviation School Behavior Deviation Inconsistent Explanation of Bruises, Scars, Unexplained marks PEREX Life Change (loss of job, retirement, etc.) Evidence of Damage within the Internal Living Space Admission of Physical Assault from Victim Admission of Physical Assault from Perpetrator Admission of Physical Assault from Witness Pornography in open Significant Presence of Alcohol PEREX treated for alcoholism PEREX Related Suicides PEREX Related Deaths
MILESTONE 4: Train Model for CAP-ABUSE-NET Once the data is decomposed and compiled into Child Abuse Descriptors & Inhibitors (CHILD-ADs / CHILD-IDs), these inputs will be fed into a decision neuron. This decision neuron can have any number of inputs from one to n, where n is the total number of inputs. The inputs may be represented therefore as x 1, x 2, x 3 … x n. And the corresponding weights for the inputs as w 1, w 2, w 3 … w n. The summation of the weights multiplied by the inputs be written as x 1 w 1 + x 2 w 2 + x 3 w 3 …. + x n w n, which is the activation value. This may also be mathematically represented by the following equation: If activation value u is greater than threshold value θ, the decision neuron outputs 1. If activation value u is less than threshold value θ, the decision neuron outputs 0.
MILESTONE 4: Train Model for CAP-ABUSE-NET Cont’d The feed forward process can be represented by the following diagram where x 0, x 1, x 2 … x n represent inputs CHILD-AD / CHILD-ID and the corresponding weights for the inputs as w k0, w k1, w k2 … w kn ( k can be implemented as a bias factor). Output as y k will represent Predicted Output Identifiers (PRE-IDs) which will either be 1 or 0 ( 1=Positive Prediction; 0=Negative Prediction )
MILESTONE 5: Test Model for CAP-ABUSE-NET Once CAP-ABUSE-NET has been trained, a second segment of data should be fed into the network and the y k and the positive/negative Predicted Output Identifiers (PRE-IDs) should be compared to the actual positive/negative results (V k ) of the test data. (Model can be re-trained as necessary )
Practical Implementation of CAP-ABUSE-NET The CAP-ABUSE-NET should be packaged into a simple smart phone, desktop, or web application format that correlates simple form based input to its respective CHILD-ADs / CHILD-IDs. This can be accomplished by posing simple survey questions to case workers with confidence values (can also be programmed into a playful format that children can answer): Child Abuse Descriptor Correlating to Predicted Output Identifiers Synaptic Weight Unexplained Marks P1D, P1S, P1J, P1P, P10.0,.0,.2,.3,.4 The survey should not take longer than 15 minutes per incident visit to perform.
CAP-ABUSE-NET Accountability Feature CAP-ABUSE-NET can be programmed to with the ability to allow an export function whereby two xml encoded files containing the results of any IDABUSE jobs (containing all +/- results of per PRE-IDs) may be uploaded into the case worker’s management system and attached to the respective record of the child. One is confidential and for use only by DCFS (IDABUSE- Confidential.xml) and the other may be provided to an oversight board for accountability purposes (IDABUSE-oversight.xml) IDABUSE Job – Confidential For DCFS use ONLY Contains identifying information in IDABUSE_Confidential.xml output file IDABUSE Job – Oversight For Oversight usage if necessary Contains no person identifying information in IDABUSE_Oversight.xml output file
What CAP-ABUSE-NET is Not and Should Not Become Providing a Case Worker with the CAP-ABUSE-NET tool SHOULD NOT add an unnecessary burden through either a steep learning curve or time required to use the tool. The tool should be a separate and standalone utility from the Case Worker’s management system to avoid integration headaches. It is NOT part of the Case Worker’s management system. The tool will exist as a smart phone, desktop, or web application for the Case Worker, as well as a reader (sanitized of identifying information) for any required oversight board.
Final Thoughts The social workers are the ultimate neural network. They are responsible for accurately predicting the potential for child abuse and inhibiting the manifestation of actual abuse thousands of times per year. When they get it right, they are rarely, if ever congratulated or thanked. When they get it wrong, irrespective of insufficient predictive information or just a bad judgment, the thousands of correct judgments and children they have protected up to that point, mean nothing, as all of the focus shifts to the one wrong/bad decision. Any technology or utility that is designed to predict a future likelihood of child abuse should exist simply as a tool for a case worker to utilize in appropriate situations; It should not add an undue burden to an already difficult job!
Bibliography 1.Johnson, G. E., Mimic Nets, IEEE Transactions on Neural Networks, Vol. 4, No. 5, September 1993, pp Patterson, D. W., Artificial Neural Networks, Prentice Hall, Singapore, Finkelhor and Baron 1986; Beitchman et al. 1991; Russell 1986; Peters 1988; Mullen et al Various Child Abuse Publications 4.Boyd, John R. Destruction and Creation, US Army Command and General Staff College, September 3, 1976