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Détails bibliographiques
Auteur principal:	Lourenço de Souza Barba
Format:	Artículo científico
Langue:	es
Publié:	Universidad de Guadalajara 2010
Sujets:	Psicología esquema Lag variabilidade operante comportamento operante sequências comportamentais Variabilidade comportamental
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=274520108001
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Variabilidade Comportamental Operante e o Esquema de Reforçamento Lag-N Lourenço de Souza Barba Psicología esquema Lag variabilidade operante comportamento operante sequências comportamentais Variabilidade comportamental Pesquisadores afi rmam que a variabilidade constitui uma dimensão operante do comportamento. O estudo presente analisou a consistência dessa posição, adotando um conceito de operante que distingue classes descritivas e classes funcionais. O reforçamento diferencial modela operantes modifi cando a correlação entre as duas classes. A variação positiva da correlação representa o processo de diferenciação. As classes descritivas são defi nidas sobre parâmetros do comportamento. Defi nido um parâmetro, pode-se defi nir um parâmetro secundário, o tempo de recorrência (TR), que mede recência. Os esquemas Lag-N defi nem classes sobre o parâmetro TR. Muitos estudos sobre variabilidade operante empregaram esquemas Lag-N e reforçaram diferencialmente a emissão de diferentes sequências de respostas. Esses estudos adotaram como principal variável dependente um índice (U), que mede previsibilidade de eventos. Eram registradas as frequências em que era emitida cada uma das diferentes sequências. O índice U refl etia a uniformidade da distribuição dessas frequências. Como o esquema Lag-N não defi ne sua classe descritiva sobre U, não se pode medir a variação da correlação sobre esse índice. A variação de U não representa, portanto, o processo de diferenciação que os esquemas Lag-N promovem. Essa circunstância traz difi culdades à tese de que a variabilidade é uma dimensão operante do comportamento. 2010 artículo científico 0188-8145 https://www.redalyc.org/articulo.oa?id=274520108001 es http://www.redalyc.org/revista.oa?id=2745 Acta Comportamentalia: Revista Latina de Análisis de Comportamiento application/pdf Universidad de Guadalajara Acta Comportamentalia: Revista Latina de Análisis de Comportamiento (México) Num.2 Vol.18

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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