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Related Concept Videos

Resistance01:19

Resistance

When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
Ohm's Law01:19

Ohm's Law

Resistors are fundamental components in electrical circuits, often manufactured from metallic alloys or carbon compounds. They model a material's ability to resist the flow of electric current, a characteristic that is crucial in controlling and regulating electrical power within a circuit.
This current-resisting behavior of resistors is governed by Ohm's law, which states that the voltage across a resistor is directly proportional to the current flowing through it.
Ohm's Law01:21

Ohm's Law

Many materials exhibit a simple relationship between the values of current, voltage, and resistance, known as Ohm’s law. The current that flows through most substances is directly proportional to the voltage applied to them. The German physicist Georg Simon Ohm (1787–1854) was the first to demonstrate experimentally that the current in a metal wire is directly proportional to the voltage applied. Any material, component, or device that obeys Ohm’s law, where the current through the device is...
RLC Series Circuits: Impedance01:29

RLC Series Circuits: Impedance

When current flow is opposed in a DC or AC circuit, it is referred to as resistance or impedance, respectively. Impedance plays a key role in determining the performance of AC circuits. It is represented by Z, which is a combination of resistance and reactance, and depends upon the angular frequency, measured in ohms.
Thus, the magnitude of the impedance is given by the following equation,
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
Resistance and Conductance01:25

Resistance and Conductance

A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their length...

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Resistance/reactance level.

Larry E Beutler1, T Mark Harwood, Aaron Michelson

  • 1Pacific Graduate School ofPsychology, Palo Alto University, 1791 Arastradero Rd., Palo Alto, CA 94063, USA. lbeutler@pgsp.edu

Journal of Clinical Psychology
|November 26, 2010
PubMed
Summary
This summary is machine-generated.

Matching therapist directiveness to patient reactance is key. Patients with low resistance benefit from directive therapy, while those with high resistance improve with nondirective approaches, according to a meta-analysis.

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Area of Science:

  • Psychology
  • Psychotherapy Research

Background:

  • Patient resistance to change is a common challenge in psychotherapy across various therapeutic modalities.
  • Effective management of patient resistance is crucial for successful treatment outcomes.

Purpose of the Study:

  • To define and exemplify patient-treatment matching specifically for patient resistance or reactance.
  • To investigate the impact of matching therapist directiveness to patient reactance levels.

Main Methods:

  • Conducted an original meta-analysis of 12 studies involving 1,102 participants.
  • Analyzed the relationship between therapist directiveness and patient reactance levels.

Main Results:

  • Findings support matching treatment approach to patient's resistance level.
  • Patients with low trait-like resistance responded better to directive treatments (d = .82).
  • Patients with high resistance responded best to nondirective treatments.

Conclusions:

  • Patient-treatment matching, specifically aligning therapist directiveness with patient reactance, is an effective strategy.
  • Recommendations for clinical practice are provided based on the meta-analysis findings.