<s>
Schacter_NP1 's_GE study_NN1 of_IO affiliation_NN1 has_VHZ suggested_VVN that_CST all_DB human_JJ beings_NN2 need_VV0 the_AT company_NN1 of_IO others_NN2 ._. 
</s>
<s>
We_PPIS2 are_VBR sociable_JJ animals_NN2 and_CC therefore_RR need_VV0 to_TO have_VHI interpersonal_JJ relationships_NN2 ._. 
</s>
<s>
These_DD2 relationships_NN2 can_VM range_VVI from_II romantic_JJ to_II casual_JJ friendships_NN2 ._. 
</s>
<s>
However_RRQV the_AT topic_NN1 most_RRT investigated_VVN by_II psychologists_NN2 is_VBZ romantic_JJ relationships_NN2 ,_, as_CSA nearly_RR all_DB human_JJ beings_NN2 strive_VV0 to_TO achieve_VVI this_DD1 relationship_NN1 ._. 
</s>
<s>
Several_DA2 theories_NN2 have_VH0 been_VBN suggested_VVN as_II21 to_II22 why_RRQ human_JJ beings_NN2 are_VBR attracted_VVN to_II others_NN2 essentially_RR the_AT origins_NN2 of_IO affiliation_NN1 ._. 
</s>
<s>
An_AT1 evolutionary_JJ theory_NN1 would_VM suggest_VVI that_CST it_PPH1 is_VBZ a_AT1 way_NN1 of_IO preserving_VVG ourselves_PPX2 ,_, as_CSA we_PPIS2 find_VV0 safety_NN1 and_CC comfort_VV0 in_II the_AT presence_NN1 of_IO others_NN2 ._. 
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<s>
Or_CC that_CST we_PPIS2 simply_RR wish_VV0 to_TO ensure_VVI that_CST our_APPGE genes_NN2 are_VBR passed_VVN on_RP in_II the_AT form_NN1 of_IO our_APPGE offspring_NN ._. 
</s>
<s>
Other_JJ theories_NN2 suggest_VV0 that_CST we_PPIS2 are_VBR attracted_VVN to_II other_JJ human_JJ beings_NN2 simply_RR by_II factors_NN2 such_II21 as_II22 similarity_NN1 or_CC physical_JJ attractiveness_NN1 ._. 
</s>
<s>
Although_CS that_DD1 in_II itself_PPX1 has_VHZ been_VBN suggested_VVN to_TO indicate_VVI 'good_NN1 genes_NN2 '_GE by_II evolutionary_JJ psychologists_NN2 ._. 
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<s>
How_RGQ physical_JJ attractive_JJ someone_PN1 is_VBZ ,_, is_VBZ considered_VVN to_TO be_VBI one_MC1 of_IO the_AT first_MD things_NN2 we_PPIS2 notice_VV0 about_II a_AT1 person_NN1 ._. 
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<s>
If_CS a_AT1 woman_NN1 's_GE face_NN1 is_VBZ seen_VVN to_TO resemble_VVI that_DD1 of_IO a_AT1 young_JJ child_NN1 she_PPHS1 is_VBZ thought_VVN of_IO as_RG attractive_JJ ._. 
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<s>
Essentially_RR if_CS she_PPHS1 has_VHZ large_JJ eyes_NN2 a_AT1 small_JJ nose_NN1 and_CC chin_NN1 ._. 
</s>
<s>
Men_NN2 are_VBR considered_VVN attractive_JJ if_CS they_PPHS2 possess_VV0 a_AT1 square_JJ jaw_NN1 ,_, small_JJ eyes_NN2 and_CC thin_JJ lips_NN2 ._. 
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<s>
As_CSA Cunningham_NP1 suggested_VVD that_CST this_DD1 indicated_VVD maturity_NN1 ,_, Eysenck_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
The_AT 'halo_NN1 effect'_NN1 suggests_VVZ that_CST we_PPIS2 form_VV0 our_APPGE total_JJ impression_NN1 of_IO a_AT1 person_NN1 from_II this_DD1 one_MC1 outstanding_JJ trait_NN1 ._. 
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<s>
We_PPIS2 associate_VV0 physical_JJ beauty_NN1 with_IW goodness_NN1 ,_, and_CC physical_JJ attraction_NN1 with_IW beauty_NN1 ._. 
</s>
<s>
Bringham_NN1 in_II 1971_MC suggested_VVD that_CST men_NN2 and_CC women_NN2 both_RR agree_VV0 that_CST physically_RR attractive_JJ people_NN are_VBR thought_VVN of_IO as_CSA poised_VVN ,_, sociable_JJ ,_, interesting_JJ ,_, independent_JJ ,_, exciting_JJ and_CC sexually_RR warm_JJ ,_, Eysenck_NP1 (_( 2001_MC )_) ._. 
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<s>
Also_RR physically_RR attractive_JJ children_NN2 are_VBR thought_VVN of_IO as_RG better_RRR behaved_VVN and_CC considered_VVN more_RGR intelligent_JJ ._. 
</s>
<s>
The_AT 'matching_JJ hypothesis_NN1 '_GE though_RR suggests_VVZ that_CST we_PPIS2 do_VD0 not_XX seek_VVI the_AT most_RGT physically_RR attractive_JJ person_NN1 ._. 
</s>
<s>
Instead_RR we_PPIS2 search_VV0 for_IF someone_PN1 who_PNQS is_VBZ similar_JJ to_II ourselves_PPX2 in_II physical_JJ attractiveness_NN1 ._. 
</s>
<s>
We_PPIS2 seek_VV0 this_DD1 compromise_NN1 as_CSA we_PPIS2 have_VH0 a_AT1 fear_NN1 of_IO rejection_NN1 from_II someone_PN1 who_PNQS more_RRR physically_RR attractive_JJ than_CSN ourselves_PPX2 ._. 
</s>
<s>
In_II 1966_MC Walster_NP1 conducted_VVD an_AT1 experiment_NN1 in_II which_DDQ he_PPHS1 found_VVD that_CST the_AT hypothesis_NN1 was_VBDZ disproved_VVN ._. 
</s>
<s>
Students_NN2 were_VBDR asked_VVN to_II rate_NN1 partners_NN2 who_PNQS had_VHD been_VBN randomly_RR selected_VVN ._. 
</s>
<s>
It_PPH1 was_VBDZ found_VVN that_CST students_NN2 preferred_JJ partners_NN2 who_PNQS were_VBDR more_RGR physically_RR attractive_JJ not_XX someone_PN1 who_PNQS matched_VVD them_PPHO2 ,_, Atkinson_NP1 (_( 2000_MC )_) ._. 
</s>
<s>
However_RR three_MC years_NNT2 later_RRR Walster_NP1 and_CC Walster_NP1 repeated_VVD the_AT experiment_NN1 but_CCB this_DD1 time_NNT1 the_AT students_NN2 met_VVD beforehand_RR ._. 
</s>
<s>
This_DD1 time_NNT1 it_PPH1 was_VBDZ found_VVN that_CST there_EX was_VBDZ a_AT1 greater_JJR likeness_NN1 for_IF similar_JJ attractiveness_NN1 ._. 
</s>
<s>
This_DD1 was_VBDZ possibly_RR because_CS they_PPHS2 had_VHD more_DAR time_NNT1 to_TO think_VVI about_II the_AT qualities_NN2 they_PPHS2 wanted_VVD in_II a_AT1 partner_NN1 ,_, and_CC had_VHD had_VHN enough_DD time_NNT1 to_TO be_VBI able_JK to_TO look_VVI past_II how_RGQ attractive_JJ the_AT person_NN1 was_VBDZ ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
The_AT theory_NN1 that_CST similarly_RR attractive_JJ people_NN attract_VV0 was_VBDZ supported_VVN by_II Murstein_NP1 's_GE research_NN1 in_II 1972_MC ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
He_PPHS1 showed_VVD pictures_NN2 of_IO couples_NN2 and_CC engaged_JJ couples_NN2 and_CC asked_VVD people_NN to_TO judge_VVI them_PPHO2 in_II31 terms_II32 of_II33 physical_JJ attractiveness_NN1 ._. 
</s>
<s>
He_PPHS1 found_VVD that_CST there_EX was_VBDZ a_AT1 tendency_NN1 for_IF the_AT couples_NN2 to_TO be_VBI rated_VVN in_II31 terms_II32 of_II33 similar_JJ attractiveness_NN1 ._. 
</s>
<s>
Similarity_NN1 in_II attitude_NN1 is_VBZ also_RR another_DD1 factor_NN1 that_CST has_VHZ been_VBN suggested_VVN as_II why_RRQ we_PPIS2 are_VBR attracted_VVN to_II other_JJ human_JJ beings_NN2 ._. 
</s>
<s>
In_II 1961_MC Newcomb_NP1 found_VVD that_CST 58%_NNU of_IO people_NN who_PNQS shared_VVD similar_JJ attitudes_NN2 and_CC lived_VVD together_RL were_VBDR more_RGR likely_JJ to_TO develop_VVI a_AT1 friendship_NN1 ,_, Atkinson_NP1 (_( 2000_MC )_) ._. 
</s>
<s>
In_II contrast_NN1 to_II 25%_NNU likelihood_NN1 of_IO people_NN who_PNQS had_VHD different_JJ attitudes_NN2 forming_VVG a_AT1 friendship_NN1 ._. 
</s>
<s>
Therefore_RR it_PPH1 does_VDZ seem_VVI to_TO be_VBI an_AT1 important_JJ factor_NN1 in_II determining_VVG interpersonal_JJ attraction_NN1 ._. 
</s>
<s>
However_RRQV Bryne_NP1 in_II 1968_MC suggested_VVD that_DD1 attitude_NN1 similarity_NN1 had_VHD more_DAR of_IO an_AT1 effect_NN1 on_II interpersonal_JJ attraction_NN1 when_CS the_AT attitudes_NN2 themselves_PPX2 were_VBDR of_IO importance_NN1 ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
If_CS a_AT1 certain_JJ attitude_NN1 were_VBDR important_JJ to_II an_AT1 individual_NN1 it_PPH1 would_VM be_VBI the_AT similarity_NN1 between_II the_AT two_MC people_NN on_II this_DD1 topic_NN1 that_CST would_VM be_VBI of_IO most_DAT importance_NN1 concerning_II attraction_NN1 ._. 
</s>
<s>
Bryne_NP1 did_VDD a_AT1 further_JJR laboratory_NN1 study_NN1 in_II 1971_MC ,_, where_RRQ participants_NN2 had_VHD to_TO complete_VVI an_AT1 attitude_NN1 questionnaire_NN1 and_CC then_RT later_RRR make_VV0 judgements_NN2 about_II another_DD1 person_NN1 about_II whom_PNQO attitudes_NN2 are_VBR shown_VVN ._. 
</s>
<s>
He_PPHS1 found_VVD we_PPIS2 tend_VV0 to_TO like_VVI those_DD2 with_IW similar_JJ attitudes_NN2 and_CC tend_VVI to_TO dislike_VVI those_DD2 with_IW dissimilar_JJ ._. 
</s>
<s>
Similarity_NN1 seems_VVZ to_TO be_VBI valued_VVN very_RG highly_RR in_II what_DDQ is_VBZ attractive_JJ about_II fellow_JJ human_JJ beings_NN2 ,_, as_CSA similarity_NN1 in_II personality_NN1 is_VBZ also_RR considered_VVN an_AT1 important_JJ factor_NN1 ._. 
</s>
<s>
In_II 1958_MC Winch_NP1 argued_VVD that_CST married_JJ couples_NN2 will_VM be_VBI happier_JJR if_CS they_PPHS2 each_DD1 have_VH0 complementary_JJ needs_NN2 ,_, so_RR a_AT1 domineering_JJ husband_NN1 and_CC submissive_JJ wife_NN1 would_VM be_VBI well_RR suited_VVN ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
However_RR most_DAT evidence_NN1 indicates_VVZ that_DD1 similarity_NN1 of_IO personality_NN1 is_VBZ important_JJ ._. 
</s>
<s>
Burgess_NP1 and_CC Wallin_NP1 in_II 1953_MC studied_VVD 1000_MC engaged_JJ couples_NN2 with_II31 reference_II32 to_II33 42_MC personality_NN1 traits_NN2 ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
Finding_VVG there_EX was_VBDZ significant_JJ within_II couple_NN1 similarity_NN1 concerning_VVG at_RR21 least_RR22 14_MC of_IO the_AT personality_NN1 characteristics_NN2 ._. 
</s>
<s>
However_RRQV when_CS considering_VVG interpersonal_JJ attraction_NN1 individual_JJ differences_NN2 must_VM be_VBI considered_VVN ._. 
</s>
<s>
As_CSA some_DD people_NN attach_VV0 more_DAR significance_NN1 than_CSN others_NN2 to_II physical_JJ attractiveness_NN1 ,_, personality_NN1 and_CC attitude_NN1 ._. 
</s>
<s>
The_AT evolutionary_JJ theory_NN1 suggests_VVZ that_CST our_APPGE behaviour_NN1 must_VM be_VBI adaptive_JJ otherwise_RR individuals_NN2 would_VM not_XX have_VHI lived_VVN long_RR enough_RR to_TO pass_VVI them_PPHO2 on_II21 to_II22 their_APPGE offspring_NN ._. 
</s>
<s>
Our_APPGE social_JJ behaviour_NN1 towards_II relationships_NN2 has_VHZ been_VBN developed_VVN over_RP thousands_NNO2 of_IO years_NNT2 ,_, as_CSA it_PPH1 has_VHZ been_VBN the_AT most_RGT successful_JJ at_II producing_VVG offspring_NN ._. 
</s>
<s>
Males_NN2 and_CC Females_NN2 both_RR seek_VV0 sexual_JJ partners_NN2 who_PNQS are_VBR most_RGT likely_JJ to_TO produce_VVI healthy_JJ children_NN2 ._. 
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<s>
This_DD1 could_VM explain_VVI why_RRQ physically_RR healthy_JJ partners_NN2 are_VBR generally_RR preferred_VVN to_II unhealthy_JJ ones_NN2 ._. 
</s>
<s>
Also_RR men_NN2 tend_VV0 to_TO prefer_VVI women_NN2 who_PNQS are_VBR younger_JJR than_CSN them_PPHO2 because_CS younger_JJR women_NN2 are_VBR more_RGR likely_JJ to_TO be_VBI fertile_JJ ._. 
</s>
<s>
In_II 1930_MC Fisher_NP1 devised_VVD a_AT1 hypothesis_NN1 entitled_VVN the_AT 'runaway_NN1 process_NN1 '_GE ._. 
</s>
<s>
Stating_VVG that_CST females_NN2 are_VBR initially_RR attracted_VVN to_II the_AT features_NN2 of_IO a_AT1 male_NN1 that_CST have_VH0 survival_NN1 value_NN1 ._. 
</s>
<s>
This_DD1 is_VBZ also_RR described_VVN as_II the_AT 'sexy_JJ sons_NN2 '_GE hypothesis_NN1 ,_, Eysenk_NP1 (_( 2001_MC )_) ._. 
</s>
<s>
The_AT female_NN1 looks_VVZ for_IF a_AT1 physically_RR attractive_JJ male_NN1 ,_, as_CSA firstly_RR their_APPGE desirable_JJ characteristics_NN2 will_VM be_VBI passed_VVN on_II21 to_II22 the_AT son_NN1 ._. 
</s>
<s>
Therefore_RR his_APPGE reproductive_JJ chances_NN2 will_VM be_VBI enhanced_VVN thus_RR the_AT mother_NN1 's_GE genes_NN2 are_VBR perpetuated_VVN ._. 
</s>
<s>
Females_NN2 it_PPH1 has_VHZ been_VBN suggested_VVN also_RR select_JJ mates_NN2 on_II the_AT basis_NN1 of_IO non-inherited_JJ characteristics_NN2 ,_, most_RGT especially_RR their_APPGE possession_NN1 of_IO resources_NN2 ._. 
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<s>
This_DD1 is_VBZ because_CS for_IF women_NN2 there_EX is_VBZ a_AT1 large_JJ investment_NN1 being_VBG put_VVN it_PPH1 when_CS it_PPH1 comes_VVZ to_II having_VHG children_NN2 ._. 
</s>
<s>
Therefore_RR they_PPHS2 look_VV0 for_IF a_AT1 good_JJ investment_NN1 ,_, which_DDQ in_II31 terms_II32 of_II33 a_AT1 partner_NN1 means_NN having_VHG good_JJ resources_NN2 ._. 
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<s>
So_RR he_PPHS1 will_VM be_VBI able_JK to_TO provide_VVI for_IF her_PPHO1 and_CC her_APPGE child_NN1 ._. 
</s>
<s>
Buss_NP1 's_GE cross-cultural_JJ study_NN1 in_II 1989_MC suggests_VVZ both_RR men_NN2 and_CC women_NN2 follow_VV0 the_AT same_DA patterns_NN2 of_IO behaviour_NN1 as_CSA predicted_VVN by_II the_AT evolutionary_JJ theory_NN1 when_CS searching_VVG for_IF a_AT1 partner_NN1 ._. 
</s>
<s>
Finding_VVG that_CST men_NN2 look_VV0 for_IF women_NN2 younger_JJR than_CSN themselves_PPX2 and_CC women_NN2 for_IF men_NN2 older_JJR than_CSN themselves_PPX2 ._. 
</s>
<s>
This_DD1 is_VBZ because_CS younger_JJR women_NN2 are_VBR more_RGR fertile_JJ and_CC older_JJR men_NN2 are_VBR more_RGR likely_JJ to_TO have_VHI obtained_VVN greater_JJR resources_NN2 ._. 
</s>
<s>
Davis_NP1 's_GE study_NN1 in_II 1990_MC on_II the_AT contents_NN2 of_IO personal_JJ advertisements_NN2 gives_VVZ further_JJR weight_NN1 to_II the_AT evolutionary_JJ theory_NN1 ._. 
</s>
<s>
He_PPHS1 found_VVD women_NN2 more_RGR often_RR than_CSN not_XX advertised_VVN their_APPGE physical_JJ beauty_NN1 ,_, whilst_CS men_NN2 emphasised_VVD their_APPGE wealth_NN1 or_CC other_JJ resources_NN2 ._. 
</s>
<s>
However_RRQV the_AT notion_NN1 that_CST romantic_JJ relationships_NN2 have_VH0 reproduction_NN1 as_CSA their_APPGE primary_JJ goal_NN1 does_VDZ not_XX apply_VVI to_II all_DB romantic_JJ relationships_NN2 ._. 
</s>
<s>
He_PPHS1 does_VDZ not_XX account_VVI for_IF homosexual_JJ relationships_NN2 or_CC heterosexual_JJ relationships_NN2 in_II which_DDQ there_EX is_VBZ no_AT intention_NN1 to_TO have_VHI children_NN2 ._. 
</s>
<s>
There_EX is_VBZ also_RR the_AT Propinquity_NN1 Effect_NN1 ,_, which_DDQ concerns_VVZ the_AT attraction_NN1 of_IO other_JJ human_JJ beings_NN2 ,_, we_PPIS2 tend_VV0 to_TO like_VVI those_DD2 we_PPIS2 find_VV0 ourselves_PPX2 near_RL and_CC whom_PNQO we_PPIS2 tend_VV0 to_TO interact_VVI ._. 
</s>
<s>
Kerckhoff_VV0 reports_NN2 of_IO the_AT Nashville_NP1 study_NN1 in_II which_DDQ couples_NN2 within_II the_AT area_NN1 applying_VVG for_IF a_AT1 marriage_NN1 license_NN1 had_VHD there_RL separate_JJ addresses_NN2 measured_VVN in_II miles_NNU2 apart_II21 from_II22 each_PPX221 other_PPX222 ._. 
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<s>
61.6%_FO of_IO couples_NN2 lived_VVN within_II 20_MC blocks_NN2 of_IO each_PPX221 other_PPX222 ,_, Kerckhoff_NP1 (_( 1956_MC )_) ._. 
</s>
<s>
Festinger_NP1 ,_, Schacter_NP1 and_CC Back_RP in_II 1950_MC found_VVD much_RR the_AT same_DA when_CS studying_VVG residents_NN2 in_II a_AT1 new_JJ housing_NN1 project_NN1 ._. 
</s>
<s>
41%_NNU named_VVD their_APPGE next-door_JJ neighbour_NN1 as_CSA their_APPGE best_JJT friend_NN1 ,_, 2%_NNU two_MC doors_NN2 away_RL and_CC 10%_NNU three_MC doors_NN2 away_RL ._. 
</s>
<s>
The_AT attraction_NN1 of_IO other_JJ human_JJ beings_NN2 is_VBZ that_CST we_PPIS2 need_VV0 human_JJ contact_NN1 ._. 
</s>
<s>
If_CS we_PPIS2 are_VBR isolated_VVN we_PPIS2 become_VV0 fearful_JJ and_CC we_PPIS2 find_VV0 comfort_NN1 and_CC safety_NN1 in_II other_JJ people_NN ._. 
</s>
<s>
Physical_JJ attractiveness_NN1 seems_VVZ to_TO play_VVI an_AT1 important_JJ role_NN1 in_II what_DDQ attracts_VVZ us_PPIO2 to_II a_AT1 specific_JJ person_NN1 ._. 
</s>
<s>
It_PPH1 seems_VVZ that_CST we_PPIS2 are_VBR more_RGR likely_JJ to_TO associate_VVI good_JJ values_NN2 upon_II a_AT1 physically_RR attractive_JJ person_NN1 than_CSN someone_PN1 less_DAR so_RR ._. 
</s>
<s>
Whilst_CS similarity_NN1 seems_VVZ too_RG more_RGR important_JJ in_II developing_VVG an_AT1 attraction_NN1 with_IW someone_PN1 ._. 
</s>
<s>
Whilst_CS the_AT evolutionary_JJ theory_NN1 can_VM be_VBI disproved_VVN as_CSA it_PPH1 does_VDZ not_XX apply_VVI to_II homosexual_JJ relationships_NN2 and_CC childless_JJ marriages_NN2 ._. 
</s>
<s>
It_PPH1 does_VDZ however_RR give_VVI explanation_NN1 to_II certain_JJ types_NN2 of_IO social_JJ behaviour_NN1 towards_II relationships_NN2 ._. 
</s>
<s>
Why_RRQ men_NN2 tend_VV0 to_TO prefer_VVI younger_JJR women_NN2 and_CC why_RRQ women_NN2 prefer_VV0 older_JJR men_NN2 ._. 
</s>
<s>
However_RR why_RRQ one_MC1 person_NN1 is_VBZ attracted_VVN to_II another_DD1 is_VBZ always_RR going_VVGK to_TO be_VBI hard_JJ to_TO explain_VVI ,_, as_CSA it_PPH1 is_VBZ such_DA an_AT1 individual_JJ thing_NN1 ._. 
</s>
<s>
Atkinson_NP1 ,_, R.Lal._NP1 (_( 2000_MC )_) ._. 
</s>
<s>
Hilgard_NP1 's_GE introduction_NN1 to_II Psychology_NN1 ._. 
</s>
<s>
London_NP1 :_: Harcourt_NP1 Eysenck_NP1 ,_, M.W._NNU (_( 2001_MC )_) ._. 
</s>
<s>
Social_JJ Psychology_NN1 ._. 
</s>
<s>
Psychology_NN1 Press_VV0 Ltd_JJ :_: Sussex_NP1 Kerckhoff_NP1 ,_, A.C._NN1 (_( 1956_MC )_) ._. 
</s>
<s>
The_AT meaning_NN1 of_IO residential_JJ Propinquity_NN1 as_II a_AT1 factor_NN1 in_II mate_NN1 selection_NN1 :_: Social_JJ Forces_NN2 ._. 
</s>
<s>
34_MC ,_, No3_FO pp207_FO ._. 
</s>
