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Dose-Response Relationship: Selectivity and Specificity01:25

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Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
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Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
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Differential Response and the Reduction of Child Maltreatment and Foster Care Services Utilization in the U.S. From 2004 to 2017.

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Health and public health approach to ending child abuse and neglect.

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Differential Response and Children Re-Reported to Child Protective Services: County Data From the National Child Abuse and Neglect Data System (NCANDS).

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Commentary: taking a deep breath before reflecting on differential response.

Lisa Merkel-Holguin1, Donald C Bross1

  • 1University of Colorado School of Medicine, USA.

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Differential Response (DR) in child welfare shows limitations despite rigorous studies. Research questions persist regarding intervention adequacy, effectiveness of traditional investigations, triage decision-making, and unintended consequences of DR implementation.

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Area of Science:

  • Child welfare research and evaluation.
  • Child protective services (CPS) reform.
  • Randomized control trial (RCT) evaluation designs.

Background:

  • Understanding Differential Response (DR) as a CPS reform has been advanced by numerous rigorous studies using RCTs.
  • Despite methodological strengths, limitations exist in child welfare research and evaluation projects.
  • CPS professionals are encouraged to adopt more scientific thinking to drive improvements in the field.

Discussion:

  • The adequacy of CPS interventions (Alternative Response/AR and Immediate Response/IR) is questioned, especially given the short-term nature of many responses and the intractable problems families face.
  • Limited service availability and accessibility may hinder significant improvements, even with differing family responses.
  • A notable absence of quality research exists on effective interventions for families undergoing traditional child abuse and neglect investigations, a gap DR research has not fully addressed.

Key Insights:

  • The implementation of DR raises questions about its impact on CPS triage decisions, distinguishing cases needing intervention from those that might benefit but do not require it.
  • The effectiveness of triage as an explicit or implicit assumption of DR remains unclear; without it, the ability of CPS to respond appropriately to varying case needs is unknown.
  • Reforms risk failing to achieve desired outcomes without reliable methods for determining urgent service needs.

Outlook:

  • Unintended consequences of adopting or rejecting DR may not have been fully considered.
  • Achieving scientifically-based practice changes is a long-term endeavor, rarely accomplished within a few years.
  • Pausing for reflection is crucial for navigating complex, long-range human service initiatives.